New patch to review for coreboot: 9f941fe ipq8064: prepare UART driver for use in coreboot
Marc Jones (marc.jones@se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/7259
-gerrit
commit 9f941fe69e56ba12fec93e04fd4df85854246074 Author: Vadim Bendebury vbendeb@chromium.org Date: Tue Apr 22 15:25:10 2014 -0700
ipq8064: prepare UART driver for use in coreboot
These driver needs to be in src/lib, and the include file needs to be renamed to avoid collision with the top level uart.h.
BUG=chrome-os-partner:27784 TEST=emerge-storm coreboot still works
Change-Id: Ie12f44e055bbef0eb8b1a3ffc8d6742e7a446942 Signed-off-by: Vadim Bendebury vbendeb@chromium.org Reviewed-on: https://chromium-review.googlesource.com/196393 (cherry picked from commit c5618fd418642f5b009582f5f6bc51f7c9d54bec) Signed-off-by: Marc Jones marc.jones@se-eng.com --- src/console/ipq806x_console.c | 440 ---------------------------- src/lib/uart_ipq806.c | 440 ++++++++++++++++++++++++++++ src/soc/qualcomm/ipq806x/include/ipq_uart.h | 281 ++++++++++++++++++ src/soc/qualcomm/ipq806x/include/uart.h | 281 ------------------ 4 files changed, 721 insertions(+), 721 deletions(-)
diff --git a/src/console/ipq806x_console.c b/src/console/ipq806x_console.c deleted file mode 100644 index c65f876..0000000 --- a/src/console/ipq806x_console.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Copyright (c) 2012 The Linux Foundation. All rights reserved. - * Source : APQ8064 LK boot - * - * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google, Inc. nor the names of its contributors - * may be used to endorse or promote products derived from this - * software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - - -#include <common.h> -#include <asm/arch-ipq806x/gsbi.h> -#include <asm/arch-ipq806x/clock.h> -#include <asm/arch-ipq806x/uart.h> -#include <serial.h> - -#define FIFO_DATA_SIZE 4 - -extern board_ipq806x_params_t *gboard_param; - -static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base); - -/* Received data is valid or not */ -static int valid_data = 0; - -/* Received data */ -static unsigned int word = 0; - -/** - * msm_boot_uart_dm_init_rx_transfer - Init Rx transfer - * @uart_dm_base: UART controller base address - */ -static unsigned int msm_boot_uart_dm_init_rx_transfer(unsigned int uart_dm_base) -{ - /* Reset receiver */ - writel(MSM_BOOT_UART_DM_CMD_RESET_RX, - MSM_BOOT_UART_DM_CR(uart_dm_base)); - - /* Enable receiver */ - writel(MSM_BOOT_UART_DM_CR_RX_ENABLE, - MSM_BOOT_UART_DM_CR(uart_dm_base)); - writel(MSM_BOOT_UART_DM_DMRX_DEF_VALUE, - MSM_BOOT_UART_DM_DMRX(uart_dm_base)); - - /* Clear stale event */ - writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, - MSM_BOOT_UART_DM_CR(uart_dm_base)); - - /* Enable stale event */ - writel(MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT, - MSM_BOOT_UART_DM_CR(uart_dm_base)); - - return MSM_BOOT_UART_DM_E_SUCCESS; -} - -/** - * msm_boot_uart_dm_read - reads a word from the RX FIFO. - * @data: location where the read data is stored - * @count: no of valid data in the FIFO - * @wait: indicates blocking call or not blocking call - * - * Reads a word from the RX FIFO. If no data is available blocks if - * @wait is true, else returns %MSM_BOOT_UART_DM_E_RX_NOT_READY. - */ -static unsigned int -msm_boot_uart_dm_read(unsigned int *data, int *count, int wait) -{ - static int total_rx_data = 0; - static int rx_data_read = 0; - unsigned int base = 0; - uint32_t status_reg; - - base = gboard_param->uart_dm_base; - - if (data == NULL) - return MSM_BOOT_UART_DM_E_INVAL; - - status_reg = readl(MSM_BOOT_UART_DM_MISR(base)); - - /* Check for DM_RXSTALE for RX transfer to finish */ - while (!(status_reg & MSM_BOOT_UART_DM_RXSTALE)) { - status_reg = readl(MSM_BOOT_UART_DM_MISR(base)); - if (!wait) - return MSM_BOOT_UART_DM_E_RX_NOT_READY; - } - - /* Check for Overrun error. We'll just reset Error Status */ - if (readl(MSM_BOOT_UART_DM_SR(base)) & - MSM_BOOT_UART_DM_SR_UART_OVERRUN) { - writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT, - MSM_BOOT_UART_DM_CR(base)); - total_rx_data = rx_data_read = 0; - msm_boot_uart_dm_init(base); - return MSM_BOOT_UART_DM_E_RX_NOT_READY; - } - - /* Read UART_DM_RX_TOTAL_SNAP for actual number of bytes received */ - if (total_rx_data == 0) - total_rx_data = readl(MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base)); - - /* Data available in FIFO; read a word. */ - *data = readl(MSM_BOOT_UART_DM_RF(base, 0)); - - /* WAR for http://prism/CR/548280 */ - if (*data == 0) { - return MSM_BOOT_UART_DM_E_RX_NOT_READY; - } - - /* increment the total count of chars we've read so far */ - rx_data_read += FIFO_DATA_SIZE; - - /* actual count of valid data in word */ - *count = ((total_rx_data < rx_data_read) ? - (FIFO_DATA_SIZE - (rx_data_read - total_rx_data)) : - FIFO_DATA_SIZE); - - /* If there are still data left in FIFO we'll read them before - * initializing RX Transfer again - */ - if (rx_data_read < total_rx_data) - return MSM_BOOT_UART_DM_E_SUCCESS; - - msm_boot_uart_dm_init_rx_transfer(base); - total_rx_data = rx_data_read = 0; - - return MSM_BOOT_UART_DM_E_SUCCESS; -} - -/** - * msm_boot_uart_replace_lr_with_cr - replaces "\n" with "\r\n" - * @data_in: characters to be converted - * @num_of_chars: no. of characters - * @data_out: location where converted chars are stored - * - * Replace linefeed char "\n" with carriage return + linefeed - * "\r\n". Currently keeping it simple than efficient. - */ -static unsigned int -msm_boot_uart_replace_lr_with_cr(char *data_in, - int num_of_chars, - char *data_out, int *num_of_chars_out) -{ - int i = 0, j = 0; - - if ((data_in == NULL) || (data_out == NULL) || (num_of_chars < 0)) - return MSM_BOOT_UART_DM_E_INVAL; - - for (i = 0, j = 0; i < num_of_chars; i++, j++) { - if (data_in[i] == '\n') - data_out[j++] = '\r'; - - data_out[j] = data_in[i]; - } - - *num_of_chars_out = j; - - return MSM_BOOT_UART_DM_E_SUCCESS; -} - -/** - * msm_boot_uart_dm_write - transmit data - * @data: data to transmit - * @num_of_chars: no. of bytes to transmit - * - * Writes the data to the TX FIFO. If no space is available blocks - * till space becomes available. - */ -static unsigned int -msm_boot_uart_dm_write(char *data, unsigned int num_of_chars) -{ - unsigned int tx_word_count = 0; - unsigned int tx_char_left = 0, tx_char = 0; - unsigned int tx_word = 0; - int i = 0; - char *tx_data = NULL; - char new_data[1024]; - unsigned int base = gboard_param->uart_dm_base; - - if ((data == NULL) || (num_of_chars <= 0)) - return MSM_BOOT_UART_DM_E_INVAL; - - /* Replace line-feed (/n) with carriage-return + line-feed (/r/n) */ - msm_boot_uart_replace_lr_with_cr(data, num_of_chars, new_data, &i); - - tx_data = new_data; - num_of_chars = i; - - /* Write to NO_CHARS_FOR_TX register number of characters - * to be transmitted. However, before writing TX_FIFO must - * be empty as indicated by TX_READY interrupt in IMR register - */ - /* Check if transmit FIFO is empty. - * If not we'll wait for TX_READY interrupt. */ - - if (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXEMT)) { - while (!(readl(MSM_BOOT_UART_DM_ISR(base)) & MSM_BOOT_UART_DM_TX_READY)) - __udelay(1); - } - - /* We are here. FIFO is ready to be written. */ - /* Write number of characters to be written */ - writel(num_of_chars, MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base)); - - /* Clear TX_READY interrupt */ - writel(MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT, MSM_BOOT_UART_DM_CR(base)); - - /* We use four-character word FIFO. So we need to divide data into - * four characters and write in UART_DM_TF register */ - tx_word_count = (num_of_chars % 4) ? ((num_of_chars / 4) + 1) : - (num_of_chars / 4); - tx_char_left = num_of_chars; - - for (i = 0; i < (int)tx_word_count; i++) { - tx_char = (tx_char_left < 4) ? tx_char_left : 4; - PACK_CHARS_INTO_WORDS(tx_data, tx_char, tx_word); - - /* Wait till TX FIFO has space */ - while (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXRDY)) - __udelay(1); - - /* TX FIFO has space. Write the chars */ - writel(tx_word, MSM_BOOT_UART_DM_TF(base, 0)); - tx_char_left = num_of_chars - (i + 1) * 4; - tx_data = tx_data + 4; - } - - return MSM_BOOT_UART_DM_E_SUCCESS; -} - -/* - * msm_boot_uart_dm_reset - resets UART controller - * @base: UART controller base address - */ -static unsigned int msm_boot_uart_dm_reset(unsigned int base) -{ - writel(MSM_BOOT_UART_DM_CMD_RESET_RX, MSM_BOOT_UART_DM_CR(base)); - writel(MSM_BOOT_UART_DM_CMD_RESET_TX, MSM_BOOT_UART_DM_CR(base)); - writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT, MSM_BOOT_UART_DM_CR(base)); - writel(MSM_BOOT_UART_DM_CMD_RES_TX_ERR, MSM_BOOT_UART_DM_CR(base)); - writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, MSM_BOOT_UART_DM_CR(base)); - - return MSM_BOOT_UART_DM_E_SUCCESS; -} - -/* - * msm_boot_uart_dm_init - initilaizes UART controller - * @uart_dm_base: UART controller base address - */ -static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base) -{ - /* Configure UART mode registers MR1 and MR2 */ - /* Hardware flow control isn't supported */ - writel(0x0, MSM_BOOT_UART_DM_MR1(uart_dm_base)); - - /* 8-N-1 configuration: 8 data bits - No parity - 1 stop bit */ - writel(MSM_BOOT_UART_DM_8_N_1_MODE, MSM_BOOT_UART_DM_MR2(uart_dm_base)); - - /* Configure Interrupt Mask register IMR */ - writel(MSM_BOOT_UART_DM_IMR_ENABLED, MSM_BOOT_UART_DM_IMR(uart_dm_base)); - - /* - * Configure Tx and Rx watermarks configuration registers - * TX watermark value is set to 0 - interrupt is generated when - * FIFO level is less than or equal to 0 - */ - writel(MSM_BOOT_UART_DM_TFW_VALUE, MSM_BOOT_UART_DM_TFWR(uart_dm_base)); - - /* RX watermark value */ - writel(MSM_BOOT_UART_DM_RFW_VALUE, MSM_BOOT_UART_DM_RFWR(uart_dm_base)); - - /* Configure Interrupt Programming Register */ - /* Set initial Stale timeout value */ - writel(MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB, - MSM_BOOT_UART_DM_IPR(uart_dm_base)); - - /* Configure IRDA if required */ - /* Disabling IRDA mode */ - writel(0x0, MSM_BOOT_UART_DM_IRDA(uart_dm_base)); - - /* Configure hunt character value in HCR register */ - /* Keep it in reset state */ - writel(0x0, MSM_BOOT_UART_DM_HCR(uart_dm_base)); - - /* - * Configure Rx FIFO base address - * Both TX/RX shares same SRAM and default is half-n-half. - * Sticking with default value now. - * As such RAM size is (2^RAM_ADDR_WIDTH, 32-bit entries). - * We have found RAM_ADDR_WIDTH = 0x7f - */ - - /* Issue soft reset command */ - msm_boot_uart_dm_reset(uart_dm_base); - - /* Enable/Disable Rx/Tx DM interfaces */ - /* Data Mover not currently utilized. */ - writel(0x0, MSM_BOOT_UART_DM_DMEN(uart_dm_base)); - - /* Enable transmitter */ - writel(MSM_BOOT_UART_DM_CR_TX_ENABLE, - MSM_BOOT_UART_DM_CR(uart_dm_base)); - - /* Initialize Receive Path */ - msm_boot_uart_dm_init_rx_transfer(uart_dm_base); - - return 0; -} - -/** - * uart_dm_init - initializes UART - * - * Initializes clocks, GPIO and UART controller. - */ -static int uart_dm_init(void) -{ - unsigned int dm_base, gsbi_base; - - dm_base = gboard_param->uart_dm_base; - gsbi_base = gboard_param->uart_gsbi_base; - ipq_configure_gpio(gboard_param->dbg_uart_gpio, NO_OF_DBG_UART_GPIOS); - - /* Configure the uart clock */ - uart_clock_config(gboard_param->uart_gsbi, - gboard_param->mnd_value.m_value, - gboard_param->mnd_value.n_value, - gboard_param->mnd_value.d_value, - gboard_param->clk_dummy); - - writel(GSBI_PROTOCOL_CODE_I2C_UART << - GSBI_CTRL_REG_PROTOCOL_CODE_S, - GSBI_CTRL_REG(gsbi_base)); - writel(UART_DM_CLK_RX_TX_BIT_RATE, MSM_BOOT_UART_DM_CSR(dm_base)); - /* Intialize UART_DM */ - msm_boot_uart_dm_init(dm_base); - - return 0; -} - -/** - * ipq806x_serial_putc - transmits a character - * @c: character to transmit - */ -static void ipq806x_serial_putc(char c) -{ - msm_boot_uart_dm_write(&c, 1); -} - -/** - * ipq806x_serial_puts - transmits a string of data - * @s: string to transmit - */ -static void ipq806x_serial_puts(const char *s) -{ - while (*s != '\0') - serial_putc(*s++); -} - -/** - * ipq806x_serial_tstc - checks if data available for reading - * - * Returns 1 if data available, 0 otherwise - */ -static int ipq806x_serial_tstc(void) -{ - /* Return if data is already read */ - if (valid_data) - return 1; - - /* Read data from the FIFO */ - if (msm_boot_uart_dm_read(&word, &valid_data, 0) != MSM_BOOT_UART_DM_E_SUCCESS) - return 0; - - return 1; -} - -/** - * ipq806x_serial_getc - reads a character - * - * Returns the character read from serial port. - */ -static int ipq806x_serial_getc(void) -{ - int byte; - - while (!serial_tstc()) { - /* wait for incoming data */ - } - - byte = (int)word & 0xff; - word = word >> 8; - valid_data--; - - return byte; -} - -static struct serial_device ipq_serial_device = { - .name = "ipq_serial", - .start = uart_dm_init, - .getc = ipq806x_serial_getc, - .tstc = ipq806x_serial_tstc, - .putc = ipq806x_serial_putc, - .puts = ipq806x_serial_puts, -}; - -__weak struct serial_device *default_serial_console(void) -{ - return &ipq_serial_device; -} - -/** - * ipq806x_serial_init - initializes serial controller - */ -void ipq806x_serial_initialize(void) -{ - serial_register(&ipq_serial_device); -} diff --git a/src/lib/uart_ipq806.c b/src/lib/uart_ipq806.c new file mode 100644 index 0000000..c65f876 --- /dev/null +++ b/src/lib/uart_ipq806.c @@ -0,0 +1,440 @@ +/* + * Copyright (c) 2012 The Linux Foundation. All rights reserved. + * Source : APQ8064 LK boot + * + * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google, Inc. nor the names of its contributors + * may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + +#include <common.h> +#include <asm/arch-ipq806x/gsbi.h> +#include <asm/arch-ipq806x/clock.h> +#include <asm/arch-ipq806x/uart.h> +#include <serial.h> + +#define FIFO_DATA_SIZE 4 + +extern board_ipq806x_params_t *gboard_param; + +static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base); + +/* Received data is valid or not */ +static int valid_data = 0; + +/* Received data */ +static unsigned int word = 0; + +/** + * msm_boot_uart_dm_init_rx_transfer - Init Rx transfer + * @uart_dm_base: UART controller base address + */ +static unsigned int msm_boot_uart_dm_init_rx_transfer(unsigned int uart_dm_base) +{ + /* Reset receiver */ + writel(MSM_BOOT_UART_DM_CMD_RESET_RX, + MSM_BOOT_UART_DM_CR(uart_dm_base)); + + /* Enable receiver */ + writel(MSM_BOOT_UART_DM_CR_RX_ENABLE, + MSM_BOOT_UART_DM_CR(uart_dm_base)); + writel(MSM_BOOT_UART_DM_DMRX_DEF_VALUE, + MSM_BOOT_UART_DM_DMRX(uart_dm_base)); + + /* Clear stale event */ + writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, + MSM_BOOT_UART_DM_CR(uart_dm_base)); + + /* Enable stale event */ + writel(MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT, + MSM_BOOT_UART_DM_CR(uart_dm_base)); + + return MSM_BOOT_UART_DM_E_SUCCESS; +} + +/** + * msm_boot_uart_dm_read - reads a word from the RX FIFO. + * @data: location where the read data is stored + * @count: no of valid data in the FIFO + * @wait: indicates blocking call or not blocking call + * + * Reads a word from the RX FIFO. If no data is available blocks if + * @wait is true, else returns %MSM_BOOT_UART_DM_E_RX_NOT_READY. + */ +static unsigned int +msm_boot_uart_dm_read(unsigned int *data, int *count, int wait) +{ + static int total_rx_data = 0; + static int rx_data_read = 0; + unsigned int base = 0; + uint32_t status_reg; + + base = gboard_param->uart_dm_base; + + if (data == NULL) + return MSM_BOOT_UART_DM_E_INVAL; + + status_reg = readl(MSM_BOOT_UART_DM_MISR(base)); + + /* Check for DM_RXSTALE for RX transfer to finish */ + while (!(status_reg & MSM_BOOT_UART_DM_RXSTALE)) { + status_reg = readl(MSM_BOOT_UART_DM_MISR(base)); + if (!wait) + return MSM_BOOT_UART_DM_E_RX_NOT_READY; + } + + /* Check for Overrun error. We'll just reset Error Status */ + if (readl(MSM_BOOT_UART_DM_SR(base)) & + MSM_BOOT_UART_DM_SR_UART_OVERRUN) { + writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT, + MSM_BOOT_UART_DM_CR(base)); + total_rx_data = rx_data_read = 0; + msm_boot_uart_dm_init(base); + return MSM_BOOT_UART_DM_E_RX_NOT_READY; + } + + /* Read UART_DM_RX_TOTAL_SNAP for actual number of bytes received */ + if (total_rx_data == 0) + total_rx_data = readl(MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base)); + + /* Data available in FIFO; read a word. */ + *data = readl(MSM_BOOT_UART_DM_RF(base, 0)); + + /* WAR for http://prism/CR/548280 */ + if (*data == 0) { + return MSM_BOOT_UART_DM_E_RX_NOT_READY; + } + + /* increment the total count of chars we've read so far */ + rx_data_read += FIFO_DATA_SIZE; + + /* actual count of valid data in word */ + *count = ((total_rx_data < rx_data_read) ? + (FIFO_DATA_SIZE - (rx_data_read - total_rx_data)) : + FIFO_DATA_SIZE); + + /* If there are still data left in FIFO we'll read them before + * initializing RX Transfer again + */ + if (rx_data_read < total_rx_data) + return MSM_BOOT_UART_DM_E_SUCCESS; + + msm_boot_uart_dm_init_rx_transfer(base); + total_rx_data = rx_data_read = 0; + + return MSM_BOOT_UART_DM_E_SUCCESS; +} + +/** + * msm_boot_uart_replace_lr_with_cr - replaces "\n" with "\r\n" + * @data_in: characters to be converted + * @num_of_chars: no. of characters + * @data_out: location where converted chars are stored + * + * Replace linefeed char "\n" with carriage return + linefeed + * "\r\n". Currently keeping it simple than efficient. + */ +static unsigned int +msm_boot_uart_replace_lr_with_cr(char *data_in, + int num_of_chars, + char *data_out, int *num_of_chars_out) +{ + int i = 0, j = 0; + + if ((data_in == NULL) || (data_out == NULL) || (num_of_chars < 0)) + return MSM_BOOT_UART_DM_E_INVAL; + + for (i = 0, j = 0; i < num_of_chars; i++, j++) { + if (data_in[i] == '\n') + data_out[j++] = '\r'; + + data_out[j] = data_in[i]; + } + + *num_of_chars_out = j; + + return MSM_BOOT_UART_DM_E_SUCCESS; +} + +/** + * msm_boot_uart_dm_write - transmit data + * @data: data to transmit + * @num_of_chars: no. of bytes to transmit + * + * Writes the data to the TX FIFO. If no space is available blocks + * till space becomes available. + */ +static unsigned int +msm_boot_uart_dm_write(char *data, unsigned int num_of_chars) +{ + unsigned int tx_word_count = 0; + unsigned int tx_char_left = 0, tx_char = 0; + unsigned int tx_word = 0; + int i = 0; + char *tx_data = NULL; + char new_data[1024]; + unsigned int base = gboard_param->uart_dm_base; + + if ((data == NULL) || (num_of_chars <= 0)) + return MSM_BOOT_UART_DM_E_INVAL; + + /* Replace line-feed (/n) with carriage-return + line-feed (/r/n) */ + msm_boot_uart_replace_lr_with_cr(data, num_of_chars, new_data, &i); + + tx_data = new_data; + num_of_chars = i; + + /* Write to NO_CHARS_FOR_TX register number of characters + * to be transmitted. However, before writing TX_FIFO must + * be empty as indicated by TX_READY interrupt in IMR register + */ + /* Check if transmit FIFO is empty. + * If not we'll wait for TX_READY interrupt. */ + + if (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXEMT)) { + while (!(readl(MSM_BOOT_UART_DM_ISR(base)) & MSM_BOOT_UART_DM_TX_READY)) + __udelay(1); + } + + /* We are here. FIFO is ready to be written. */ + /* Write number of characters to be written */ + writel(num_of_chars, MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base)); + + /* Clear TX_READY interrupt */ + writel(MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT, MSM_BOOT_UART_DM_CR(base)); + + /* We use four-character word FIFO. So we need to divide data into + * four characters and write in UART_DM_TF register */ + tx_word_count = (num_of_chars % 4) ? ((num_of_chars / 4) + 1) : + (num_of_chars / 4); + tx_char_left = num_of_chars; + + for (i = 0; i < (int)tx_word_count; i++) { + tx_char = (tx_char_left < 4) ? tx_char_left : 4; + PACK_CHARS_INTO_WORDS(tx_data, tx_char, tx_word); + + /* Wait till TX FIFO has space */ + while (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXRDY)) + __udelay(1); + + /* TX FIFO has space. Write the chars */ + writel(tx_word, MSM_BOOT_UART_DM_TF(base, 0)); + tx_char_left = num_of_chars - (i + 1) * 4; + tx_data = tx_data + 4; + } + + return MSM_BOOT_UART_DM_E_SUCCESS; +} + +/* + * msm_boot_uart_dm_reset - resets UART controller + * @base: UART controller base address + */ +static unsigned int msm_boot_uart_dm_reset(unsigned int base) +{ + writel(MSM_BOOT_UART_DM_CMD_RESET_RX, MSM_BOOT_UART_DM_CR(base)); + writel(MSM_BOOT_UART_DM_CMD_RESET_TX, MSM_BOOT_UART_DM_CR(base)); + writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT, MSM_BOOT_UART_DM_CR(base)); + writel(MSM_BOOT_UART_DM_CMD_RES_TX_ERR, MSM_BOOT_UART_DM_CR(base)); + writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, MSM_BOOT_UART_DM_CR(base)); + + return MSM_BOOT_UART_DM_E_SUCCESS; +} + +/* + * msm_boot_uart_dm_init - initilaizes UART controller + * @uart_dm_base: UART controller base address + */ +static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base) +{ + /* Configure UART mode registers MR1 and MR2 */ + /* Hardware flow control isn't supported */ + writel(0x0, MSM_BOOT_UART_DM_MR1(uart_dm_base)); + + /* 8-N-1 configuration: 8 data bits - No parity - 1 stop bit */ + writel(MSM_BOOT_UART_DM_8_N_1_MODE, MSM_BOOT_UART_DM_MR2(uart_dm_base)); + + /* Configure Interrupt Mask register IMR */ + writel(MSM_BOOT_UART_DM_IMR_ENABLED, MSM_BOOT_UART_DM_IMR(uart_dm_base)); + + /* + * Configure Tx and Rx watermarks configuration registers + * TX watermark value is set to 0 - interrupt is generated when + * FIFO level is less than or equal to 0 + */ + writel(MSM_BOOT_UART_DM_TFW_VALUE, MSM_BOOT_UART_DM_TFWR(uart_dm_base)); + + /* RX watermark value */ + writel(MSM_BOOT_UART_DM_RFW_VALUE, MSM_BOOT_UART_DM_RFWR(uart_dm_base)); + + /* Configure Interrupt Programming Register */ + /* Set initial Stale timeout value */ + writel(MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB, + MSM_BOOT_UART_DM_IPR(uart_dm_base)); + + /* Configure IRDA if required */ + /* Disabling IRDA mode */ + writel(0x0, MSM_BOOT_UART_DM_IRDA(uart_dm_base)); + + /* Configure hunt character value in HCR register */ + /* Keep it in reset state */ + writel(0x0, MSM_BOOT_UART_DM_HCR(uart_dm_base)); + + /* + * Configure Rx FIFO base address + * Both TX/RX shares same SRAM and default is half-n-half. + * Sticking with default value now. + * As such RAM size is (2^RAM_ADDR_WIDTH, 32-bit entries). + * We have found RAM_ADDR_WIDTH = 0x7f + */ + + /* Issue soft reset command */ + msm_boot_uart_dm_reset(uart_dm_base); + + /* Enable/Disable Rx/Tx DM interfaces */ + /* Data Mover not currently utilized. */ + writel(0x0, MSM_BOOT_UART_DM_DMEN(uart_dm_base)); + + /* Enable transmitter */ + writel(MSM_BOOT_UART_DM_CR_TX_ENABLE, + MSM_BOOT_UART_DM_CR(uart_dm_base)); + + /* Initialize Receive Path */ + msm_boot_uart_dm_init_rx_transfer(uart_dm_base); + + return 0; +} + +/** + * uart_dm_init - initializes UART + * + * Initializes clocks, GPIO and UART controller. + */ +static int uart_dm_init(void) +{ + unsigned int dm_base, gsbi_base; + + dm_base = gboard_param->uart_dm_base; + gsbi_base = gboard_param->uart_gsbi_base; + ipq_configure_gpio(gboard_param->dbg_uart_gpio, NO_OF_DBG_UART_GPIOS); + + /* Configure the uart clock */ + uart_clock_config(gboard_param->uart_gsbi, + gboard_param->mnd_value.m_value, + gboard_param->mnd_value.n_value, + gboard_param->mnd_value.d_value, + gboard_param->clk_dummy); + + writel(GSBI_PROTOCOL_CODE_I2C_UART << + GSBI_CTRL_REG_PROTOCOL_CODE_S, + GSBI_CTRL_REG(gsbi_base)); + writel(UART_DM_CLK_RX_TX_BIT_RATE, MSM_BOOT_UART_DM_CSR(dm_base)); + /* Intialize UART_DM */ + msm_boot_uart_dm_init(dm_base); + + return 0; +} + +/** + * ipq806x_serial_putc - transmits a character + * @c: character to transmit + */ +static void ipq806x_serial_putc(char c) +{ + msm_boot_uart_dm_write(&c, 1); +} + +/** + * ipq806x_serial_puts - transmits a string of data + * @s: string to transmit + */ +static void ipq806x_serial_puts(const char *s) +{ + while (*s != '\0') + serial_putc(*s++); +} + +/** + * ipq806x_serial_tstc - checks if data available for reading + * + * Returns 1 if data available, 0 otherwise + */ +static int ipq806x_serial_tstc(void) +{ + /* Return if data is already read */ + if (valid_data) + return 1; + + /* Read data from the FIFO */ + if (msm_boot_uart_dm_read(&word, &valid_data, 0) != MSM_BOOT_UART_DM_E_SUCCESS) + return 0; + + return 1; +} + +/** + * ipq806x_serial_getc - reads a character + * + * Returns the character read from serial port. + */ +static int ipq806x_serial_getc(void) +{ + int byte; + + while (!serial_tstc()) { + /* wait for incoming data */ + } + + byte = (int)word & 0xff; + word = word >> 8; + valid_data--; + + return byte; +} + +static struct serial_device ipq_serial_device = { + .name = "ipq_serial", + .start = uart_dm_init, + .getc = ipq806x_serial_getc, + .tstc = ipq806x_serial_tstc, + .putc = ipq806x_serial_putc, + .puts = ipq806x_serial_puts, +}; + +__weak struct serial_device *default_serial_console(void) +{ + return &ipq_serial_device; +} + +/** + * ipq806x_serial_init - initializes serial controller + */ +void ipq806x_serial_initialize(void) +{ + serial_register(&ipq_serial_device); +} diff --git a/src/soc/qualcomm/ipq806x/include/ipq_uart.h b/src/soc/qualcomm/ipq806x/include/ipq_uart.h new file mode 100644 index 0000000..6fff046 --- /dev/null +++ b/src/soc/qualcomm/ipq806x/include/ipq_uart.h @@ -0,0 +1,281 @@ +/* + * Copyright (c) 2012 The Linux Foundation. All rights reserved.* + * + * Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of Code Aurora Forum, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __UART_DM_H__ +#define __UART_DM_H__ + +#include <asm/io.h> +#include "common.h" +#define MSM_BOOT_UART_DM_EXTR_BITS(value, start_pos, end_pos) \ + ((value << (32 - end_pos))\ + >> (32 - (end_pos - start_pos))) + + +extern void dsb(void); +#define PACK_CHARS_INTO_WORDS(a, cnt, word) { \ + word = 0; \ + int j; \ + for(j=0; j < (int)cnt; j++) { \ + word |= (a[j] & 0xff)<< (j * 8);\ + } \ + } + +extern void __udelay(unsigned long usec); + + +enum MSM_BOOT_UART_DM_PARITY_MODE { + MSM_BOOT_UART_DM_NO_PARITY, + MSM_BOOT_UART_DM_ODD_PARITY, + MSM_BOOT_UART_DM_EVEN_PARITY, + MSM_BOOT_UART_DM_SPACE_PARITY +}; + +/* UART Stop Bit Length */ +enum MSM_BOOT_UART_DM_STOP_BIT_LEN { + MSM_BOOT_UART_DM_SBL_9_16, + MSM_BOOT_UART_DM_SBL_1, + MSM_BOOT_UART_DM_SBL_1_9_16, + MSM_BOOT_UART_DM_SBL_2 +}; + +/* UART Bits per Char */ +enum MSM_BOOT_UART_DM_BITS_PER_CHAR { + MSM_BOOT_UART_DM_5_BPS, + MSM_BOOT_UART_DM_6_BPS, + MSM_BOOT_UART_DM_7_BPS, + MSM_BOOT_UART_DM_8_BPS +}; + +/* 8-N-1 Configuration */ +#define MSM_BOOT_UART_DM_8_N_1_MODE (MSM_BOOT_UART_DM_NO_PARITY | \ + (MSM_BOOT_UART_DM_SBL_1 << 2) | \ + (MSM_BOOT_UART_DM_8_BPS << 4)) + +/* UART_DM Registers */ + +/* UART Operational Mode Register */ +#define MSM_BOOT_UART_DM_MR1(base) ((base) + 0x00) +#define MSM_BOOT_UART_DM_MR2(base) ((base) + 0x04) +#define MSM_BOOT_UART_DM_RXBRK_ZERO_CHAR_OFF (1 << 8) +#define MSM_BOOT_UART_DM_LOOPBACK (1 << 7) + +/* UART Clock Selection Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_CSR(base) ((base) + 0xA0) +#else +#define MSM_BOOT_UART_DM_CSR(base) ((base) + 0x08) +#endif + +/* UART DM TX FIFO Registers - 4 */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_TF(base, x) ((base) + 0x100+(4*(x))) +#else +#define MSM_BOOT_UART_DM_TF(base, x) ((base) + 0x70+(4*(x))) +#endif + +/* UART Command Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_CR(base) ((base) + 0xA8) +#else +#define MSM_BOOT_UART_DM_CR(base) ((base) + 0x10) +#endif +#define MSM_BOOT_UART_DM_CR_RX_ENABLE (1 << 0) +#define MSM_BOOT_UART_DM_CR_RX_DISABLE (1 << 1) +#define MSM_BOOT_UART_DM_CR_TX_ENABLE (1 << 2) +#define MSM_BOOT_UART_DM_CR_TX_DISABLE (1 << 3) + +/* UART Channel Command */ +#define MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x) ((x & 0x0f) << 4) +#define MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x) ((x >> 4 ) << 11 ) +#define MSM_BOOT_UART_DM_CR_CH_CMD(x) (MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x)\ + | MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x)) +#define MSM_BOOT_UART_DM_CMD_NULL MSM_BOOT_UART_DM_CR_CH_CMD(0) +#define MSM_BOOT_UART_DM_CMD_RESET_RX MSM_BOOT_UART_DM_CR_CH_CMD(1) +#define MSM_BOOT_UART_DM_CMD_RESET_TX MSM_BOOT_UART_DM_CR_CH_CMD(2) +#define MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT MSM_BOOT_UART_DM_CR_CH_CMD(3) +#define MSM_BOOT_UART_DM_CMD_RES_BRK_CHG_INT MSM_BOOT_UART_DM_CR_CH_CMD(4) +#define MSM_BOOT_UART_DM_CMD_START_BRK MSM_BOOT_UART_DM_CR_CH_CMD(5) +#define MSM_BOOT_UART_DM_CMD_STOP_BRK MSM_BOOT_UART_DM_CR_CH_CMD(6) +#define MSM_BOOT_UART_DM_CMD_RES_CTS_N MSM_BOOT_UART_DM_CR_CH_CMD(7) +#define MSM_BOOT_UART_DM_CMD_RES_STALE_INT MSM_BOOT_UART_DM_CR_CH_CMD(8) +#define MSM_BOOT_UART_DM_CMD_PACKET_MODE MSM_BOOT_UART_DM_CR_CH_CMD(9) +#define MSM_BOOT_UART_DM_CMD_MODE_RESET MSM_BOOT_UART_DM_CR_CH_CMD(C) +#define MSM_BOOT_UART_DM_CMD_SET_RFR_N MSM_BOOT_UART_DM_CR_CH_CMD(D) +#define MSM_BOOT_UART_DM_CMD_RES_RFR_N MSM_BOOT_UART_DM_CR_CH_CMD(E) +#define MSM_BOOT_UART_DM_CMD_RES_TX_ERR MSM_BOOT_UART_DM_CR_CH_CMD(10) +#define MSM_BOOT_UART_DM_CMD_CLR_TX_DONE MSM_BOOT_UART_DM_CR_CH_CMD(11) +#define MSM_BOOT_UART_DM_CMD_RES_BRKSTRT_INT MSM_BOOT_UART_DM_CR_CH_CMD(12) +#define MSM_BOOT_UART_DM_CMD_RES_BRKEND_INT MSM_BOOT_UART_DM_CR_CH_CMD(13) +#define MSM_BOOT_UART_DM_CMD_RES_PER_FRM_INT MSM_BOOT_UART_DM_CR_CH_CMD(14) + +/*UART General Command */ +#define MSM_BOOT_UART_DM_CR_GENERAL_CMD(x) ((x) << 8) + +#define MSM_BOOT_UART_DM_GCMD_NULL MSM_BOOT_UART_DM_CR_GENERAL_CMD(0) +#define MSM_BOOT_UART_DM_GCMD_CR_PROT_EN MSM_BOOT_UART_DM_CR_GENERAL_CMD(1) +#define MSM_BOOT_UART_DM_GCMD_CR_PROT_DIS MSM_BOOT_UART_DM_CR_GENERAL_CMD(2) +#define MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT MSM_BOOT_UART_DM_CR_GENERAL_CMD(3) +#define MSM_BOOT_UART_DM_GCMD_SW_FORCE_STALE MSM_BOOT_UART_DM_CR_GENERAL_CMD(4) +#define MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT MSM_BOOT_UART_DM_CR_GENERAL_CMD(5) +#define MSM_BOOT_UART_DM_GCMD_DIS_STALE_EVT MSM_BOOT_UART_DM_CR_GENERAL_CMD(6) + +/* UART Interrupt Mask Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_IMR(base) ((base) + 0xB0) +#else +#define MSM_BOOT_UART_DM_IMR(base) ((base) + 0x14) +#endif + +#define MSM_BOOT_UART_DM_TXLEV (1 << 0) +#define MSM_BOOT_UART_DM_RXHUNT (1 << 1) +#define MSM_BOOT_UART_DM_RXBRK_CHNG (1 << 2) +#define MSM_BOOT_UART_DM_RXSTALE (1 << 3) +#define MSM_BOOT_UART_DM_RXLEV (1 << 4) +#define MSM_BOOT_UART_DM_DELTA_CTS (1 << 5) +#define MSM_BOOT_UART_DM_CURRENT_CTS (1 << 6) +#define MSM_BOOT_UART_DM_TX_READY (1 << 7) +#define MSM_BOOT_UART_DM_TX_ERROR (1 << 8) +#define MSM_BOOT_UART_DM_TX_DONE (1 << 9) +#define MSM_BOOT_UART_DM_RXBREAK_START (1 << 10) +#define MSM_BOOT_UART_DM_RXBREAK_END (1 << 11) +#define MSM_BOOT_UART_DM_PAR_FRAME_ERR_IRQ (1 << 12) + +#define MSM_BOOT_UART_DM_IMR_ENABLED (MSM_BOOT_UART_DM_TX_READY | \ + MSM_BOOT_UART_DM_TXLEV | \ + MSM_BOOT_UART_DM_RXSTALE) + +/* UART Interrupt Programming Register */ +#define MSM_BOOT_UART_DM_IPR(base) ((base) + 0x18) +#define MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB 0x0f +#define MSM_BOOT_UART_DM_STALE_TIMEOUT_MSB 0 /* Not used currently */ + +/* UART Transmit/Receive FIFO Watermark Register */ +#define MSM_BOOT_UART_DM_TFWR(base) ((base) + 0x1C) +/* Interrupt is generated when FIFO level is less than or equal to this value */ +#define MSM_BOOT_UART_DM_TFW_VALUE 0 + +#define MSM_BOOT_UART_DM_RFWR(base) ((base) + 0x20) +/*Interrupt generated when no of words in RX FIFO is greater than this value */ +#define MSM_BOOT_UART_DM_RFW_VALUE 0 + +/* UART Hunt Character Register */ +#define MSM_BOOT_UART_DM_HCR(base) ((base) + 0x24) + +/* Used for RX transfer initialization */ +#define MSM_BOOT_UART_DM_DMRX(base) ((base) + 0x34) + +/* Default DMRX value - any value bigger than FIFO size would be fine */ +#define MSM_BOOT_UART_DM_DMRX_DEF_VALUE 0x220 + +/* Register to enable IRDA function */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_IRDA(base) ((base) + 0xB8) +#else +#define MSM_BOOT_UART_DM_IRDA(base) ((base) + 0x38) +#endif + +/* UART Data Mover Enable Register */ +#define MSM_BOOT_UART_DM_DMEN(base) ((base) + 0x3C) + +/* Number of characters for Transmission */ +#define MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base) ((base) + 0x040) + +/* UART RX FIFO Base Address */ +#define MSM_BOOT_UART_DM_BADR(base) ((base) + 0x44) + +/* UART Status Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_SR(base) ((base) + 0x0A4) +#else +#define MSM_BOOT_UART_DM_SR(base) ((base) + 0x008) +#endif +#define MSM_BOOT_UART_DM_SR_RXRDY (1 << 0) +#define MSM_BOOT_UART_DM_SR_RXFULL (1 << 1) +#define MSM_BOOT_UART_DM_SR_TXRDY (1 << 2) +#define MSM_BOOT_UART_DM_SR_TXEMT (1 << 3) +#define MSM_BOOT_UART_DM_SR_UART_OVERRUN (1 << 4) +#define MSM_BOOT_UART_DM_SR_PAR_FRAME_ERR (1 << 5) +#define MSM_BOOT_UART_DM_RX_BREAK (1 << 6) +#define MSM_BOOT_UART_DM_HUNT_CHAR (1 << 7) +#define MSM_BOOT_UART_DM_RX_BRK_START_LAST (1 << 8) + +/* UART Receive FIFO Registers - 4 in numbers */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_RF(base, x) ((base) + 0x140 + (4*(x))) +#else +#define MSM_BOOT_UART_DM_RF(base, x) ((base) + 0x70 + (4*(x))) +#endif + +/* UART Masked Interrupt Status Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_MISR(base) ((base) + 0xAC) +#else +#define MSM_BOOT_UART_DM_MISR(base) ((base) + 0x10) +#endif + +/* UART Interrupt Status Register */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_ISR(base) ((base) + 0xB4) +#else +#define MSM_BOOT_UART_DM_ISR(base) ((base) + 0x14) +#endif + +/* Number of characters received since the end of last RX transfer */ +#if PERIPH_BLK_BLSP +#define MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base) ((base) + 0xBC) +#else +#define MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base) ((base) + 0x38) +#endif + +/* UART TX FIFO Status Register */ +#define MSM_BOOT_UART_DM_TXFS(base) ((base) + 0x4C) +#define MSM_BOOT_UART_DM_TXFS_STATE_LSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,0,6) +#define MSM_BOOT_UART_DM_TXFS_STATE_MSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,14,31) +#define MSM_BOOT_UART_DM_TXFS_BUF_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,7,9) +#define MSM_BOOT_UART_DM_TXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13) + +/* UART RX FIFO Status Register */ +#define MSM_BOOT_UART_DM_RXFS(base) ((base) + 0x50) +#define MSM_BOOT_UART_DM_RXFS_STATE_LSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,0,6) +#define MSM_BOOT_UART_DM_RXFS_STATE_MSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,14,31) +#define MSM_BOOT_UART_DM_RXFS_BUF_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,7,9) +#define MSM_BOOT_UART_DM_RXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13) + +/* Macros for Common Errors */ +#define MSM_BOOT_UART_DM_E_SUCCESS 0 +#define MSM_BOOT_UART_DM_E_FAILURE 1 +#define MSM_BOOT_UART_DM_E_TIMEOUT 2 +#define MSM_BOOT_UART_DM_E_INVAL 3 +#define MSM_BOOT_UART_DM_E_MALLOC_FAIL 4 +#define MSM_BOOT_UART_DM_E_RX_NOT_READY 5 + +#endif /* __UART_DM_H__ */ + diff --git a/src/soc/qualcomm/ipq806x/include/uart.h b/src/soc/qualcomm/ipq806x/include/uart.h deleted file mode 100644 index 6fff046..0000000 --- a/src/soc/qualcomm/ipq806x/include/uart.h +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Copyright (c) 2012 The Linux Foundation. All rights reserved.* - * - * Copyright (c) 2010, Code Aurora Forum. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials provided - * with the distribution. - * * Neither the name of Code Aurora Forum, Inc. nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE - * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN - * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef __UART_DM_H__ -#define __UART_DM_H__ - -#include <asm/io.h> -#include "common.h" -#define MSM_BOOT_UART_DM_EXTR_BITS(value, start_pos, end_pos) \ - ((value << (32 - end_pos))\ - >> (32 - (end_pos - start_pos))) - - -extern void dsb(void); -#define PACK_CHARS_INTO_WORDS(a, cnt, word) { \ - word = 0; \ - int j; \ - for(j=0; j < (int)cnt; j++) { \ - word |= (a[j] & 0xff)<< (j * 8);\ - } \ - } - -extern void __udelay(unsigned long usec); - - -enum MSM_BOOT_UART_DM_PARITY_MODE { - MSM_BOOT_UART_DM_NO_PARITY, - MSM_BOOT_UART_DM_ODD_PARITY, - MSM_BOOT_UART_DM_EVEN_PARITY, - MSM_BOOT_UART_DM_SPACE_PARITY -}; - -/* UART Stop Bit Length */ -enum MSM_BOOT_UART_DM_STOP_BIT_LEN { - MSM_BOOT_UART_DM_SBL_9_16, - MSM_BOOT_UART_DM_SBL_1, - MSM_BOOT_UART_DM_SBL_1_9_16, - MSM_BOOT_UART_DM_SBL_2 -}; - -/* UART Bits per Char */ -enum MSM_BOOT_UART_DM_BITS_PER_CHAR { - MSM_BOOT_UART_DM_5_BPS, - MSM_BOOT_UART_DM_6_BPS, - MSM_BOOT_UART_DM_7_BPS, - MSM_BOOT_UART_DM_8_BPS -}; - -/* 8-N-1 Configuration */ -#define MSM_BOOT_UART_DM_8_N_1_MODE (MSM_BOOT_UART_DM_NO_PARITY | \ - (MSM_BOOT_UART_DM_SBL_1 << 2) | \ - (MSM_BOOT_UART_DM_8_BPS << 4)) - -/* UART_DM Registers */ - -/* UART Operational Mode Register */ -#define MSM_BOOT_UART_DM_MR1(base) ((base) + 0x00) -#define MSM_BOOT_UART_DM_MR2(base) ((base) + 0x04) -#define MSM_BOOT_UART_DM_RXBRK_ZERO_CHAR_OFF (1 << 8) -#define MSM_BOOT_UART_DM_LOOPBACK (1 << 7) - -/* UART Clock Selection Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_CSR(base) ((base) + 0xA0) -#else -#define MSM_BOOT_UART_DM_CSR(base) ((base) + 0x08) -#endif - -/* UART DM TX FIFO Registers - 4 */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_TF(base, x) ((base) + 0x100+(4*(x))) -#else -#define MSM_BOOT_UART_DM_TF(base, x) ((base) + 0x70+(4*(x))) -#endif - -/* UART Command Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_CR(base) ((base) + 0xA8) -#else -#define MSM_BOOT_UART_DM_CR(base) ((base) + 0x10) -#endif -#define MSM_BOOT_UART_DM_CR_RX_ENABLE (1 << 0) -#define MSM_BOOT_UART_DM_CR_RX_DISABLE (1 << 1) -#define MSM_BOOT_UART_DM_CR_TX_ENABLE (1 << 2) -#define MSM_BOOT_UART_DM_CR_TX_DISABLE (1 << 3) - -/* UART Channel Command */ -#define MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x) ((x & 0x0f) << 4) -#define MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x) ((x >> 4 ) << 11 ) -#define MSM_BOOT_UART_DM_CR_CH_CMD(x) (MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x)\ - | MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x)) -#define MSM_BOOT_UART_DM_CMD_NULL MSM_BOOT_UART_DM_CR_CH_CMD(0) -#define MSM_BOOT_UART_DM_CMD_RESET_RX MSM_BOOT_UART_DM_CR_CH_CMD(1) -#define MSM_BOOT_UART_DM_CMD_RESET_TX MSM_BOOT_UART_DM_CR_CH_CMD(2) -#define MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT MSM_BOOT_UART_DM_CR_CH_CMD(3) -#define MSM_BOOT_UART_DM_CMD_RES_BRK_CHG_INT MSM_BOOT_UART_DM_CR_CH_CMD(4) -#define MSM_BOOT_UART_DM_CMD_START_BRK MSM_BOOT_UART_DM_CR_CH_CMD(5) -#define MSM_BOOT_UART_DM_CMD_STOP_BRK MSM_BOOT_UART_DM_CR_CH_CMD(6) -#define MSM_BOOT_UART_DM_CMD_RES_CTS_N MSM_BOOT_UART_DM_CR_CH_CMD(7) -#define MSM_BOOT_UART_DM_CMD_RES_STALE_INT MSM_BOOT_UART_DM_CR_CH_CMD(8) -#define MSM_BOOT_UART_DM_CMD_PACKET_MODE MSM_BOOT_UART_DM_CR_CH_CMD(9) -#define MSM_BOOT_UART_DM_CMD_MODE_RESET MSM_BOOT_UART_DM_CR_CH_CMD(C) -#define MSM_BOOT_UART_DM_CMD_SET_RFR_N MSM_BOOT_UART_DM_CR_CH_CMD(D) -#define MSM_BOOT_UART_DM_CMD_RES_RFR_N MSM_BOOT_UART_DM_CR_CH_CMD(E) -#define MSM_BOOT_UART_DM_CMD_RES_TX_ERR MSM_BOOT_UART_DM_CR_CH_CMD(10) -#define MSM_BOOT_UART_DM_CMD_CLR_TX_DONE MSM_BOOT_UART_DM_CR_CH_CMD(11) -#define MSM_BOOT_UART_DM_CMD_RES_BRKSTRT_INT MSM_BOOT_UART_DM_CR_CH_CMD(12) -#define MSM_BOOT_UART_DM_CMD_RES_BRKEND_INT MSM_BOOT_UART_DM_CR_CH_CMD(13) -#define MSM_BOOT_UART_DM_CMD_RES_PER_FRM_INT MSM_BOOT_UART_DM_CR_CH_CMD(14) - -/*UART General Command */ -#define MSM_BOOT_UART_DM_CR_GENERAL_CMD(x) ((x) << 8) - -#define MSM_BOOT_UART_DM_GCMD_NULL MSM_BOOT_UART_DM_CR_GENERAL_CMD(0) -#define MSM_BOOT_UART_DM_GCMD_CR_PROT_EN MSM_BOOT_UART_DM_CR_GENERAL_CMD(1) -#define MSM_BOOT_UART_DM_GCMD_CR_PROT_DIS MSM_BOOT_UART_DM_CR_GENERAL_CMD(2) -#define MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT MSM_BOOT_UART_DM_CR_GENERAL_CMD(3) -#define MSM_BOOT_UART_DM_GCMD_SW_FORCE_STALE MSM_BOOT_UART_DM_CR_GENERAL_CMD(4) -#define MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT MSM_BOOT_UART_DM_CR_GENERAL_CMD(5) -#define MSM_BOOT_UART_DM_GCMD_DIS_STALE_EVT MSM_BOOT_UART_DM_CR_GENERAL_CMD(6) - -/* UART Interrupt Mask Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_IMR(base) ((base) + 0xB0) -#else -#define MSM_BOOT_UART_DM_IMR(base) ((base) + 0x14) -#endif - -#define MSM_BOOT_UART_DM_TXLEV (1 << 0) -#define MSM_BOOT_UART_DM_RXHUNT (1 << 1) -#define MSM_BOOT_UART_DM_RXBRK_CHNG (1 << 2) -#define MSM_BOOT_UART_DM_RXSTALE (1 << 3) -#define MSM_BOOT_UART_DM_RXLEV (1 << 4) -#define MSM_BOOT_UART_DM_DELTA_CTS (1 << 5) -#define MSM_BOOT_UART_DM_CURRENT_CTS (1 << 6) -#define MSM_BOOT_UART_DM_TX_READY (1 << 7) -#define MSM_BOOT_UART_DM_TX_ERROR (1 << 8) -#define MSM_BOOT_UART_DM_TX_DONE (1 << 9) -#define MSM_BOOT_UART_DM_RXBREAK_START (1 << 10) -#define MSM_BOOT_UART_DM_RXBREAK_END (1 << 11) -#define MSM_BOOT_UART_DM_PAR_FRAME_ERR_IRQ (1 << 12) - -#define MSM_BOOT_UART_DM_IMR_ENABLED (MSM_BOOT_UART_DM_TX_READY | \ - MSM_BOOT_UART_DM_TXLEV | \ - MSM_BOOT_UART_DM_RXSTALE) - -/* UART Interrupt Programming Register */ -#define MSM_BOOT_UART_DM_IPR(base) ((base) + 0x18) -#define MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB 0x0f -#define MSM_BOOT_UART_DM_STALE_TIMEOUT_MSB 0 /* Not used currently */ - -/* UART Transmit/Receive FIFO Watermark Register */ -#define MSM_BOOT_UART_DM_TFWR(base) ((base) + 0x1C) -/* Interrupt is generated when FIFO level is less than or equal to this value */ -#define MSM_BOOT_UART_DM_TFW_VALUE 0 - -#define MSM_BOOT_UART_DM_RFWR(base) ((base) + 0x20) -/*Interrupt generated when no of words in RX FIFO is greater than this value */ -#define MSM_BOOT_UART_DM_RFW_VALUE 0 - -/* UART Hunt Character Register */ -#define MSM_BOOT_UART_DM_HCR(base) ((base) + 0x24) - -/* Used for RX transfer initialization */ -#define MSM_BOOT_UART_DM_DMRX(base) ((base) + 0x34) - -/* Default DMRX value - any value bigger than FIFO size would be fine */ -#define MSM_BOOT_UART_DM_DMRX_DEF_VALUE 0x220 - -/* Register to enable IRDA function */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_IRDA(base) ((base) + 0xB8) -#else -#define MSM_BOOT_UART_DM_IRDA(base) ((base) + 0x38) -#endif - -/* UART Data Mover Enable Register */ -#define MSM_BOOT_UART_DM_DMEN(base) ((base) + 0x3C) - -/* Number of characters for Transmission */ -#define MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base) ((base) + 0x040) - -/* UART RX FIFO Base Address */ -#define MSM_BOOT_UART_DM_BADR(base) ((base) + 0x44) - -/* UART Status Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_SR(base) ((base) + 0x0A4) -#else -#define MSM_BOOT_UART_DM_SR(base) ((base) + 0x008) -#endif -#define MSM_BOOT_UART_DM_SR_RXRDY (1 << 0) -#define MSM_BOOT_UART_DM_SR_RXFULL (1 << 1) -#define MSM_BOOT_UART_DM_SR_TXRDY (1 << 2) -#define MSM_BOOT_UART_DM_SR_TXEMT (1 << 3) -#define MSM_BOOT_UART_DM_SR_UART_OVERRUN (1 << 4) -#define MSM_BOOT_UART_DM_SR_PAR_FRAME_ERR (1 << 5) -#define MSM_BOOT_UART_DM_RX_BREAK (1 << 6) -#define MSM_BOOT_UART_DM_HUNT_CHAR (1 << 7) -#define MSM_BOOT_UART_DM_RX_BRK_START_LAST (1 << 8) - -/* UART Receive FIFO Registers - 4 in numbers */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_RF(base, x) ((base) + 0x140 + (4*(x))) -#else -#define MSM_BOOT_UART_DM_RF(base, x) ((base) + 0x70 + (4*(x))) -#endif - -/* UART Masked Interrupt Status Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_MISR(base) ((base) + 0xAC) -#else -#define MSM_BOOT_UART_DM_MISR(base) ((base) + 0x10) -#endif - -/* UART Interrupt Status Register */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_ISR(base) ((base) + 0xB4) -#else -#define MSM_BOOT_UART_DM_ISR(base) ((base) + 0x14) -#endif - -/* Number of characters received since the end of last RX transfer */ -#if PERIPH_BLK_BLSP -#define MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base) ((base) + 0xBC) -#else -#define MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base) ((base) + 0x38) -#endif - -/* UART TX FIFO Status Register */ -#define MSM_BOOT_UART_DM_TXFS(base) ((base) + 0x4C) -#define MSM_BOOT_UART_DM_TXFS_STATE_LSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,0,6) -#define MSM_BOOT_UART_DM_TXFS_STATE_MSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,14,31) -#define MSM_BOOT_UART_DM_TXFS_BUF_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,7,9) -#define MSM_BOOT_UART_DM_TXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13) - -/* UART RX FIFO Status Register */ -#define MSM_BOOT_UART_DM_RXFS(base) ((base) + 0x50) -#define MSM_BOOT_UART_DM_RXFS_STATE_LSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,0,6) -#define MSM_BOOT_UART_DM_RXFS_STATE_MSB(x) MSM_BOOT_UART_DM_EXTR_BITS(x,14,31) -#define MSM_BOOT_UART_DM_RXFS_BUF_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,7,9) -#define MSM_BOOT_UART_DM_RXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13) - -/* Macros for Common Errors */ -#define MSM_BOOT_UART_DM_E_SUCCESS 0 -#define MSM_BOOT_UART_DM_E_FAILURE 1 -#define MSM_BOOT_UART_DM_E_TIMEOUT 2 -#define MSM_BOOT_UART_DM_E_INVAL 3 -#define MSM_BOOT_UART_DM_E_MALLOC_FAIL 4 -#define MSM_BOOT_UART_DM_E_RX_NOT_READY 5 - -#endif /* __UART_DM_H__ */ -
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Marc Jones