openwrt-mirror/target/linux/generic/patches-3.8/020-ssb_update.patch

--- a/drivers/ssb/Kconfig
+++ b/drivers/ssb/Kconfig
@@ -136,6 +136,11 @@ config SSB_DRIVER_MIPS
 
 	  If unsure, say N
 
+config SSB_SFLASH
+	bool "SSB serial flash support"
+	depends on SSB_DRIVER_MIPS && BROKEN
+	default y
+
 # Assumption: We are on embedded, if we compile the MIPS core.
 config SSB_EMBEDDED
 	bool
--- a/drivers/ssb/Makefile
+++ b/drivers/ssb/Makefile
@@ -11,6 +11,7 @@ ssb-$(CONFIG_SSB_SDIOHOST)		+= sdio.o
 # built-in drivers
 ssb-y					+= driver_chipcommon.o
 ssb-y					+= driver_chipcommon_pmu.o
+ssb-$(CONFIG_SSB_SFLASH)		+= driver_chipcommon_sflash.o
 ssb-$(CONFIG_SSB_DRIVER_MIPS)		+= driver_mipscore.o
 ssb-$(CONFIG_SSB_DRIVER_EXTIF)		+= driver_extif.o
 ssb-$(CONFIG_SSB_DRIVER_PCICORE)	+= driver_pcicore.o
--- /dev/null
+++ b/drivers/ssb/driver_chipcommon_sflash.c
@@ -0,0 +1,140 @@
+/*
+ * Sonics Silicon Backplane
+ * ChipCommon serial flash interface
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+
+#include "ssb_private.h"
+
+struct ssb_sflash_tbl_e {
+	char *name;
+	u32 id;
+	u32 blocksize;
+	u16 numblocks;
+};
+
+static struct ssb_sflash_tbl_e ssb_sflash_st_tbl[] = {
+	{ "M25P20", 0x11, 0x10000, 4, },
+	{ "M25P40", 0x12, 0x10000, 8, },
+
+	{ "M25P16", 0x14, 0x10000, 32, },
+	{ "M25P32", 0x15, 0x10000, 64, },
+	{ "M25P64", 0x16, 0x10000, 128, },
+	{ "M25FL128", 0x17, 0x10000, 256, },
+	{ 0 },
+};
+
+static struct ssb_sflash_tbl_e ssb_sflash_sst_tbl[] = {
+	{ "SST25WF512", 1, 0x1000, 16, },
+	{ "SST25VF512", 0x48, 0x1000, 16, },
+	{ "SST25WF010", 2, 0x1000, 32, },
+	{ "SST25VF010", 0x49, 0x1000, 32, },
+	{ "SST25WF020", 3, 0x1000, 64, },
+	{ "SST25VF020", 0x43, 0x1000, 64, },
+	{ "SST25WF040", 4, 0x1000, 128, },
+	{ "SST25VF040", 0x44, 0x1000, 128, },
+	{ "SST25VF040B", 0x8d, 0x1000, 128, },
+	{ "SST25WF080", 5, 0x1000, 256, },
+	{ "SST25VF080B", 0x8e, 0x1000, 256, },
+	{ "SST25VF016", 0x41, 0x1000, 512, },
+	{ "SST25VF032", 0x4a, 0x1000, 1024, },
+	{ "SST25VF064", 0x4b, 0x1000, 2048, },
+	{ 0 },
+};
+
+static struct ssb_sflash_tbl_e ssb_sflash_at_tbl[] = {
+	{ "AT45DB011", 0xc, 256, 512, },
+	{ "AT45DB021", 0x14, 256, 1024, },
+	{ "AT45DB041", 0x1c, 256, 2048, },
+	{ "AT45DB081", 0x24, 256, 4096, },
+	{ "AT45DB161", 0x2c, 512, 4096, },
+	{ "AT45DB321", 0x34, 512, 8192, },
+	{ "AT45DB642", 0x3c, 1024, 8192, },
+	{ 0 },
+};
+
+static void ssb_sflash_cmd(struct ssb_chipcommon *cc, u32 opcode)
+{
+	int i;
+	chipco_write32(cc, SSB_CHIPCO_FLASHCTL,
+		       SSB_CHIPCO_FLASHCTL_START | opcode);
+	for (i = 0; i < 1000; i++) {
+		if (!(chipco_read32(cc, SSB_CHIPCO_FLASHCTL) &
+		      SSB_CHIPCO_FLASHCTL_BUSY))
+			return;
+		cpu_relax();
+	}
+	pr_err("SFLASH control command failed (timeout)!\n");
+}
+
+/* Initialize serial flash access */
+int ssb_sflash_init(struct ssb_chipcommon *cc)
+{
+	struct ssb_sflash_tbl_e *e;
+	u32 id, id2;
+
+	switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) {
+	case SSB_CHIPCO_FLASHT_STSER:
+		ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_DP);
+
+		chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 0);
+		ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES);
+		id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA);
+
+		chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 1);
+		ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES);
+		id2 = chipco_read32(cc, SSB_CHIPCO_FLASHDATA);
+
+		switch (id) {
+		case 0xbf:
+			for (e = ssb_sflash_sst_tbl; e->name; e++) {
+				if (e->id == id2)
+					break;
+			}
+			break;
+		case 0x13:
+			return -ENOTSUPP;
+		default:
+			for (e = ssb_sflash_st_tbl; e->name; e++) {
+				if (e->id == id)
+					break;
+			}
+			break;
+		}
+		if (!e->name) {
+			pr_err("Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n",
+			       id, id2);
+			return -ENOTSUPP;
+		}
+
+		break;
+	case SSB_CHIPCO_FLASHT_ATSER:
+		ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS);
+		id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA) & 0x3c;
+
+		for (e = ssb_sflash_at_tbl; e->name; e++) {
+			if (e->id == id)
+				break;
+		}
+		if (!e->name) {
+			pr_err("Unsupported Atmel serial flash (id: 0x%X)\n",
+			       id);
+			return -ENOTSUPP;
+		}
+
+		break;
+	default:
+		pr_err("Unsupported flash type\n");
+		return -ENOTSUPP;
+	}
+
+	pr_info("Found %s serial flash (blocksize: 0x%X, blocks: %d)\n",
+		e->name, e->blocksize, e->numblocks);
+
+	pr_err("Serial flash support is not implemented yet!\n");
+
+	return -ENOTSUPP;
+}
--- a/drivers/ssb/driver_gpio.c
+++ b/drivers/ssb/driver_gpio.c
@@ -74,6 +74,16 @@ static void ssb_gpio_chipco_free(struct
 	ssb_chipco_gpio_pullup(&bus->chipco, 1 << gpio, 0);
 }
 
+static int ssb_gpio_chipco_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
+
+	if (bus->bustype == SSB_BUSTYPE_SSB)
+		return ssb_mips_irq(bus->chipco.dev) + 2;
+	else
+		return -EINVAL;
+}
+
 static int ssb_gpio_chipco_init(struct ssb_bus *bus)
 {
 	struct gpio_chip *chip = &bus->gpio;
@@ -86,6 +96,7 @@ static int ssb_gpio_chipco_init(struct s
 	chip->set		= ssb_gpio_chipco_set_value;
 	chip->direction_input	= ssb_gpio_chipco_direction_input;
 	chip->direction_output	= ssb_gpio_chipco_direction_output;
+	chip->to_irq		= ssb_gpio_chipco_to_irq;
 	chip->ngpio		= 16;
 	/* There is just one SoC in one device and its GPIO addresses should be
 	 * deterministic to address them more easily. The other buses could get
@@ -134,6 +145,16 @@ static int ssb_gpio_extif_direction_outp
 	return 0;
 }
 
+static int ssb_gpio_extif_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
+
+	if (bus->bustype == SSB_BUSTYPE_SSB)
+		return ssb_mips_irq(bus->extif.dev) + 2;
+	else
+		return -EINVAL;
+}
+
 static int ssb_gpio_extif_init(struct ssb_bus *bus)
 {
 	struct gpio_chip *chip = &bus->gpio;
@@ -144,6 +165,7 @@ static int ssb_gpio_extif_init(struct ss
 	chip->set		= ssb_gpio_extif_set_value;
 	chip->direction_input	= ssb_gpio_extif_direction_input;
 	chip->direction_output	= ssb_gpio_extif_direction_output;
+	chip->to_irq		= ssb_gpio_extif_to_irq;
 	chip->ngpio		= 5;
 	/* There is just one SoC in one device and its GPIO addresses should be
 	 * deterministic to address them more easily. The other buses could get
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -10,6 +10,7 @@
 
 #include <linux/ssb/ssb.h>
 
+#include <linux/mtd/physmap.h>
 #include <linux/serial.h>
 #include <linux/serial_core.h>
 #include <linux/serial_reg.h>
@@ -17,6 +18,25 @@
 
 #include "ssb_private.h"
 
+static const char *part_probes[] = { "bcm47xxpart", NULL };
+
+static struct physmap_flash_data ssb_pflash_data = {
+	.part_probe_types	= part_probes,
+};
+
+static struct resource ssb_pflash_resource = {
+	.name	= "ssb_pflash",
+	.flags  = IORESOURCE_MEM,
+};
+
+struct platform_device ssb_pflash_dev = {
+	.name		= "physmap-flash",
+	.dev		= {
+		.platform_data  = &ssb_pflash_data,
+	},
+	.resource	= &ssb_pflash_resource,
+	.num_resources	= 1,
+};
 
 static inline u32 mips_read32(struct ssb_mipscore *mcore,
 			      u16 offset)
@@ -189,34 +209,43 @@ static void ssb_mips_serial_init(struct
 static void ssb_mips_flash_detect(struct ssb_mipscore *mcore)
 {
 	struct ssb_bus *bus = mcore->dev->bus;
+	struct ssb_pflash *pflash = &mcore->pflash;
 
 	/* When there is no chipcommon on the bus there is 4MB flash */
 	if (!ssb_chipco_available(&bus->chipco)) {
-		mcore->pflash.present = true;
-		mcore->pflash.buswidth = 2;
-		mcore->pflash.window = SSB_FLASH1;
-		mcore->pflash.window_size = SSB_FLASH1_SZ;
-		return;
+		pflash->present = true;
+		pflash->buswidth = 2;
+		pflash->window = SSB_FLASH1;
+		pflash->window_size = SSB_FLASH1_SZ;
+		goto ssb_pflash;
 	}
 
 	/* There is ChipCommon, so use it to read info about flash */
 	switch (bus->chipco.capabilities & SSB_CHIPCO_CAP_FLASHT) {
 	case SSB_CHIPCO_FLASHT_STSER:
 	case SSB_CHIPCO_FLASHT_ATSER:
-		pr_err("Serial flash not supported\n");
+		pr_debug("Found serial flash\n");
+		ssb_sflash_init(&bus->chipco);
 		break;
 	case SSB_CHIPCO_FLASHT_PARA:
 		pr_debug("Found parallel flash\n");
-		mcore->pflash.present = true;
-		mcore->pflash.window = SSB_FLASH2;
-		mcore->pflash.window_size = SSB_FLASH2_SZ;
+		pflash->present = true;
+		pflash->window = SSB_FLASH2;
+		pflash->window_size = SSB_FLASH2_SZ;
 		if ((ssb_read32(bus->chipco.dev, SSB_CHIPCO_FLASH_CFG)
 		               & SSB_CHIPCO_CFG_DS16) == 0)
-			mcore->pflash.buswidth = 1;
+			pflash->buswidth = 1;
 		else
-			mcore->pflash.buswidth = 2;
+			pflash->buswidth = 2;
 		break;
 	}
+
+ssb_pflash:
+	if (pflash->present) {
+		ssb_pflash_data.width = pflash->buswidth;
+		ssb_pflash_resource.start = pflash->window;
+		ssb_pflash_resource.end = pflash->window + pflash->window_size;
+	}
 }
 
 u32 ssb_cpu_clock(struct ssb_mipscore *mcore)
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -549,6 +549,14 @@ static int ssb_devices_register(struct s
 		dev_idx++;
 	}
 
+#ifdef CONFIG_SSB_DRIVER_MIPS
+	if (bus->mipscore.pflash.present) {
+		err = platform_device_register(&ssb_pflash_dev);
+		if (err)
+			pr_err("Error registering parallel flash\n");
+	}
+#endif
+
 	return 0;
 error:
 	/* Unwind the already registered devices. */
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -217,6 +217,21 @@ extern u32 ssb_chipco_watchdog_timer_set
 					     u32 ticks);
 extern u32 ssb_chipco_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms);
 
+/* driver_chipcommon_sflash.c */
+#ifdef CONFIG_SSB_SFLASH
+int ssb_sflash_init(struct ssb_chipcommon *cc);
+#else
+static inline int ssb_sflash_init(struct ssb_chipcommon *cc)
+{
+	pr_err("Serial flash not supported\n");
+	return 0;
+}
+#endif /* CONFIG_SSB_SFLASH */
+
+#ifdef CONFIG_SSB_DRIVER_MIPS
+extern struct platform_device ssb_pflash_dev;
+#endif
+
 #ifdef CONFIG_SSB_DRIVER_EXTIF
 extern u32 ssb_extif_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt, u32 ticks);
 extern u32 ssb_extif_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms);
--- a/include/linux/ssb/ssb_driver_mips.h
+++ b/include/linux/ssb/ssb_driver_mips.h
@@ -45,6 +45,11 @@ void ssb_mipscore_init(struct ssb_mipsco
 {
 }
 
+static inline unsigned int ssb_mips_irq(struct ssb_device *dev)
+{
+	return 0;
+}
+
 #endif /* CONFIG_SSB_DRIVER_MIPS */
 
 #endif /* LINUX_SSB_MIPSCORE_H_ */