asm106x: add programmer for ASM106x SATA controllers

The ASMedia ASM106x series is a PCIe-SATA controller chip.  It supports
an attached SPI flash chip that can contain configuration and PCI option
ROM.  The interface is a simple shifter accessed via PCI config space,
up to 4 bytes at a time.  Add a programmer driver for it.

Tested on a G536PCE1061V11 IO-PCE1061-V1.1 PCIe card, and
a MPCE2ST-A01 VER006S mini-PCIe card, both with chips marked ASM1061,
both enumerate as:

	01:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 02) (prog-if 01 [AHCI 1.0])
	        Subsystem: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:1060]

Change-Id: I591b117be911bdb8249247c20530c1cf70f6e70d
Signed-off-by: Alex Badea <vamposdecampos@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/73037
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>
---
M Makefile
A asm106x.c
M flashrom.8.tmpl
M include/programmer.h
M meson.build
M meson_options.txt
M programmer_table.c
M test_build.sh
8 files changed, 215 insertions(+), 9 deletions(-)

diff --git a/Makefile b/Makefile
index 69818ce..a7200dd 100644
--- a/Makefile
+++ b/Makefile
@@ -137,6 +137,7 @@
 	CONFIG_SATAMV \
 
 DEPENDS_ON_LIBPCI := \
+	CONFIG_ASM106X \
 	CONFIG_ATAHPT \
 	CONFIG_ATAPROMISE \
 	CONFIG_ATAVIA \
@@ -437,6 +438,9 @@
 # Always enable SiI SATA controllers for now.
 CONFIG_SATASII ?= yes
 
+# ASMedia ASM106x
+CONFIG_ASM106X ?= yes
+
 # Highpoint (HPT) ATA/RAID controller support.
 # IMPORTANT: This code is not yet working!
 CONFIG_ATAHPT ?= no
@@ -642,6 +646,12 @@
 ACTIVE_PROGRAMMERS += satasii
 endif
 
+ifeq ($(CONFIG_ASM106X), yes)
+FEATURE_FLAGS += -D'CONFIG_ASM106X=1'
+PROGRAMMER_OBJS += asm106x.o
+ACTIVE_PROGRAMMERS += asm106x
+endif
+
 ifeq ($(CONFIG_ATAHPT), yes)
 FEATURE_FLAGS += -D'CONFIG_ATAHPT=1'
 PROGRAMMER_OBJS += atahpt.o
diff --git a/asm106x.c b/asm106x.c
new file mode 100644
index 0000000..fe35f94
--- /dev/null
+++ b/asm106x.c
@@ -0,0 +1,156 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2023 Alex Badea <vamposdecampos@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdlib.h>
+#include "programmer.h"
+#include "platform/pci.h"
+
+#define PCI_VENDOR_ID_ASMEDIA	0x1b21
+
+#define ASM106X_REG_DATA	0xf0
+#define ASM106X_REG_CTRL	0xf4
+#define ASM106X_CTRL_RUN	0x20	/* SPI master is running */
+#define ASM106X_CTRL_CSN	0x10	/* CS_n pin output */
+#define ASM106X_CTRL_WRITE	0x08	/* 0=read, 1=write */
+#define ASM106X_CTRL_MASK	0xc0	/* unknown, untouched */
+
+struct asm106x_data {
+	struct pci_dev *pci;
+};
+
+static const struct dev_entry asm106x_devs[] = {
+	{PCI_VENDOR_ID_ASMEDIA, 0x0612, OK, "ASMedia", "ASM106x"},
+
+	{0},
+};
+
+static int asm106x_wait_ready(struct pci_dev *pci, uint8_t *pval)
+{
+	unsigned int timeout = 100;
+	uint8_t val;
+
+	while (timeout) {
+		val = pci_read_byte(pci, ASM106X_REG_CTRL);
+		msg_pdbg2("asm106x status %#02"PRIx8" tries %d\n", val, timeout);
+		if (!(val & ASM106X_CTRL_RUN)) {
+			if (pval)
+				*pval = val;
+			return 0;
+		}
+		default_delay(10);
+		timeout--;
+	}
+
+	msg_pdbg("asm106x timed out, ctrl %#02"PRIx8"\n", val);
+	return 1;
+}
+
+
+static int asm106x_command(const struct flashctx *flash,
+	unsigned int writecnt, unsigned int readcnt,
+	const unsigned char *writearr, unsigned char *readarr)
+{
+	struct asm106x_data *data = flash->mst->spi.data;
+	uint8_t ctrl;
+	int rv = 1;
+
+	msg_pdbg2("asm106x command: wr %d rd %d\n", writecnt, readcnt);
+	if (asm106x_wait_ready(data->pci, &ctrl))
+		return 1;
+	ctrl &= ASM106X_CTRL_MASK;
+
+	while (writecnt) {
+		const unsigned int chunk = min(writecnt, 4);
+		uint32_t val = 0;
+
+		for (int k = chunk-1; k >= 0; k--)
+			val = (val << 8) | writearr[k];
+		msg_pdbg2("asm106x write %#08"PRIx32" chunk %u\n", val, chunk);
+		pci_write_long(data->pci, ASM106X_REG_DATA, val);
+		pci_write_byte(data->pci, ASM106X_REG_CTRL,
+			ctrl | ASM106X_CTRL_RUN | ASM106X_CTRL_WRITE | chunk);
+		if (asm106x_wait_ready(data->pci, NULL))
+			goto out;
+		writecnt -= chunk;
+		writearr += chunk;
+	}
+	while (readcnt) {
+		const unsigned int chunk = min(readcnt, 4);
+
+		pci_write_byte(data->pci, ASM106X_REG_CTRL,
+			ctrl | ASM106X_CTRL_RUN | chunk);
+		if (asm106x_wait_ready(data->pci, NULL))
+			goto out;
+
+		uint32_t val = pci_read_long(data->pci, ASM106X_REG_DATA);
+		msg_pdbg2("asm106x read %#08"PRIx32" chunk %u\n", val, chunk);
+		for (unsigned int k = 0; k < chunk; k++) {
+			readarr[k] = val & 0xff;
+			val >>= 8;
+		}
+		readcnt -= chunk;
+		readarr += chunk;
+	}
+
+	rv = 0;
+out:
+	pci_write_byte(data->pci, ASM106X_REG_CTRL, ctrl | ASM106X_CTRL_CSN);
+	return rv;
+}
+
+static int asm106x_shutdown(void *data)
+{
+	free(data);
+	return 0;
+}
+
+static const struct spi_master asm106x_spi_master = {
+	.features	= SPI_MASTER_4BA,
+	.max_data_read	= MAX_DATA_READ_UNLIMITED,
+	.max_data_write	= MAX_DATA_WRITE_UNLIMITED,
+	.command	= asm106x_command,
+	.shutdown	= asm106x_shutdown,
+	.multicommand	= default_spi_send_multicommand,
+	.read		= default_spi_read,
+	.write_256	= default_spi_write_256,
+	.probe_opcode	= default_spi_probe_opcode,
+};
+
+static int asm106x_init(const struct programmer_cfg *cfg)
+{
+	struct pci_dev *pci;
+	struct asm106x_data *data;
+
+	/* TODO: no BAR required (just config space) */
+	pci = pcidev_init(cfg, asm106x_devs, PCI_ROM_ADDRESS);
+	if (!pci)
+		return 1;
+
+	data = calloc(1, sizeof(*data));
+	if (!data) {
+		msg_perr("cannot allocate memory for asm106x_data\n");
+		return 1;
+	}
+	data->pci = pci;
+	return register_spi_master(&asm106x_spi_master, data);
+}
+
+const struct programmer_entry programmer_asm106x = {
+	.name			= "asm106x",
+	.type			= PCI,
+	.devs.dev		= asm106x_devs,
+	.init			= asm106x_init,
+};
diff --git a/flashrom.8.tmpl b/flashrom.8.tmpl
index 0eabee5..dd4864d 100644
--- a/flashrom.8.tmpl
+++ b/flashrom.8.tmpl
@@ -433,6 +433,8 @@
 .sp
 .BR "* dirtyjtag_spi" " (for SPI flash ROMs attached to DirtyJTAG-compatible devices)"
 .sp
+.BR "* asm106x" " (for SPI flash ROMs attached to ASM106x PCIe SATA controllers)"
+.sp
 Some programmers have optional or mandatory parameters which are described
 in detail in the
 .B PROGRAMMER-SPECIFIC INFORMATION
@@ -1685,7 +1687,8 @@
 needs no access permissions at all.
 .sp
 .BR internal ", " nic3com ", " nicrealtek ", " nicnatsemi ", "
-.BR gfxnvidia ", " drkaiser ", " satasii ", " satamv ", " atahpt ", " atavia " and " atapromise
+.BR gfxnvidia ", " drkaiser ", " satasii ", " satamv ", " asm106x ", "
+.BR atahpt ", " atavia " and " atapromise
 have to be run as superuser/root, and need additional raw access permission.
 .sp
 .BR serprog ", " buspirate_spi ", " dediprog ", " usbblaster_spi ", " ft2232_spi ", " pickit2_spi ", " \
diff --git a/include/programmer.h b/include/programmer.h
index 2a4ca76..19363c2 100644
--- a/include/programmer.h
+++ b/include/programmer.h
@@ -55,6 +55,7 @@
 extern const size_t programmer_table_size;
 
 /* programmer drivers */
+extern const struct programmer_entry programmer_asm106x;
 extern const struct programmer_entry programmer_atahpt;
 extern const struct programmer_entry programmer_atapromise;
 extern const struct programmer_entry programmer_atavia;
diff --git a/meson.build b/meson.build
index baa1084..83fc120 100644
--- a/meson.build
+++ b/meson.build
@@ -156,6 +156,13 @@
 #   'active'      : boolean,       # added on runtime
 # }
 programmer = {
+  'asm106x' : {
+    'systems' : systems_hwaccess,
+    'deps'    : [ libpci ],
+    'groups'  : [ group_pci, group_internal ],
+    'srcs'    : files('asm106x.c', 'pcidev.c'),
+    'flags'   : [ '-DCONFIG_ASM106X=1' ],
+  },
   'atahpt' : {
     'systems' : systems_hwaccess,
     'cpu_families' : cpus_port_io,
diff --git a/meson_options.txt b/meson_options.txt
index 9dcebdc..10427c8 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -10,11 +10,11 @@
         'auto', 'all',
         'group_internal', 'group_external',
         'group_ftdi', 'group_i2c', 'group_jlink', 'group_pci', 'group_serial', 'group_usb',
-        'atahpt', 'atapromise', 'atavia', 'buspirate_spi', 'ch341a_spi', 'dediprog', 'developerbox_spi',
-        'digilent_spi', 'dirtyjtag_spi', 'drkaiser', 'dummy', 'ft2232_spi', 'gfxnvidia', 'internal', 'it8212',
-        'jlink_spi', 'linux_mtd', 'linux_spi', 'mediatek_i2c_spi', 'mstarddc_spi', 'nic3com', 'nicintel',
-        'nicintel_eeprom', 'nicintel_spi', 'nicnatsemi', 'nicrealtek', 'ogp_spi', 'parade_lspcon',
-        'pickit2_spi', 'pony_spi', 'raiden_debug_spi', 'rayer_spi', 'realtek_mst_i2c_spi', 'satamv',
-        'satasii', 'serprog',  'stlinkv3_spi', 'usbblaster_spi',
+        'asm106x', 'atahpt', 'atapromise', 'atavia', 'buspirate_spi', 'ch341a_spi', 'dediprog',
+        'developerbox_spi', 'digilent_spi', 'dirtyjtag_spi', 'drkaiser', 'dummy', 'ft2232_spi',
+        'gfxnvidia', 'internal', 'it8212', 'jlink_spi', 'linux_mtd', 'linux_spi', 'mediatek_i2c_spi',
+        'mstarddc_spi', 'nic3com', 'nicintel', 'nicintel_eeprom', 'nicintel_spi', 'nicnatsemi',
+        'nicrealtek', 'ogp_spi', 'parade_lspcon', 'pickit2_spi', 'pony_spi', 'raiden_debug_spi',
+        'rayer_spi', 'realtek_mst_i2c_spi', 'satamv', 'satasii', 'serprog',  'stlinkv3_spi', 'usbblaster_spi',
 ], description: 'Active programmers')
 option('llvm_cov', type : 'feature', value : 'disabled', description : 'build for llvm code coverage')
diff --git a/programmer_table.c b/programmer_table.c
index d58a155..0935167 100644
--- a/programmer_table.c
+++ b/programmer_table.c
@@ -52,6 +52,10 @@
     &programmer_satasii,
 #endif
 
+#if CONFIG_ASM106X == 1
+    &programmer_asm106x,
+#endif
+
 #if CONFIG_ATAHPT == 1
     &programmer_atahpt,
 #endif
diff --git a/test_build.sh b/test_build.sh
index c2f74d2..0e9d704 100755
--- a/test_build.sh
+++ b/test_build.sh
@@ -10,7 +10,7 @@
 		      PICKIT2_SPI STLINKV3_SPI PARADE_LSPCON MEDIATEK_I2C_SPI REALTEK_MST_I2C_SPI DUMMY	\
 		      DRKAISER NICREALTEK NICNATSEMI NICINTEL NICINTEL_SPI NICINTEL_EEPROM OGP_SPI	\
 		      BUSPIRATE_SPI DEDIPROG DEVELOPERBOX_SPI SATAMV LINUX_MTD LINUX_SPI IT8212		\
-		      CH341A_SPI DIGILENT_SPI DIRTYJTAG_SPI JLINK_SPI"
+		      CH341A_SPI DIGILENT_SPI DIRTYJTAG_SPI JLINK_SPI ASM106X"
 
 meson_programmer_opts="all auto group_ftdi group_i2c group_jlink group_pci group_serial group_usb		\
 			atahpt atapromise atavia buspirate_spi ch341a_spi dediprog developerbox_spi	\
@@ -18,7 +18,7 @@
 			jlink_spi linux_mtd linux_spi parade_lspcon mediatek_i2c_spi mstarddc_spi	\
 			nic3com nicintel nicintel_eeprom nicintel_spi nicnatsemi nicrealtek		\
 			ogp_spi pickit2_spi pony_spi raiden_debug_spi rayer_spi realtek_mst_i2c_spi	\
-			satamv satasii serprog stlinkv3_spi usbblaster_spi"
+			satamv satasii serprog stlinkv3_spi usbblaster_spi asm106x"
 
 
 if [ "$(basename "${CC}")" = "ccc-analyzer" ] || [ -n "${COVERITY_OUTPUT}" ]; then

