openwrt/target/linux/brcm47xx/patches-3.0/0012-bcma-move-parallel-flash-into-a-union.patch

From a1d9c96a6c9b37b26dc1149706f3061b57a62b50 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 17 Jul 2011 14:51:47 +0200
Subject: [PATCH 12/22] bcma: move parallel flash into a union


Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 arch/mips/bcm47xx/nvram.c                   |    7 ++-
 drivers/bcma/driver_mips.c                  |    9 ++--
 include/linux/bcma/bcma_driver_chipcommon.h |   75 ++++++++++++++++++++++++++-
 3 files changed, 84 insertions(+), 7 deletions(-)

--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
@@ -50,8 +50,11 @@ static void early_nvram_init(void)
 #ifdef CONFIG_BCM47XX_BCMA
 	case BCM47XX_BUS_TYPE_BCMA:
 		bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
-		base = bcma_cc->pflash.window;
-		lim = bcma_cc->pflash.window_size;
+		if (bcma_cc->flash_type != BCMA_PFLASH)
+			return;
+
+		base = bcma_cc->flash.pflash.window;
+		lim = bcma_cc->flash.pflash.window_size;
 		break;
 #endif
 	}
--- a/drivers/bcma/driver_mips.c
+++ b/drivers/bcma/driver_mips.c
@@ -189,14 +189,15 @@ static void bcma_core_mips_flash_detect(
 		break;
 	case BCMA_CC_FLASHT_PARA:
 		pr_info("found parallel flash.\n");
-		bus->drv_cc.pflash.window = 0x1c000000;
-		bus->drv_cc.pflash.window_size = 0x02000000;
+		bus->drv_cc.flash_type = BCMA_PFLASH;
+		bus->drv_cc.flash.pflash.window = 0x1c000000;
+		bus->drv_cc.flash.pflash.window_size = 0x02000000;
 
 		if ((bcma_read32(bus->drv_cc.core, BCMA_CC_FLASH_CFG) &
 		     BCMA_CC_FLASH_CFG_DS) == 0)
-			bus->drv_cc.pflash.buswidth = 1;
+			bus->drv_cc.flash.pflash.buswidth = 1;
 		else
-			bus->drv_cc.pflash.buswidth = 2;
+			bus->drv_cc.flash.pflash.buswidth = 2;
 		break;
 	default:
 		pr_err("flash not supported.\n");
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -108,10 +108,68 @@
 #define  BCMA_CC_JCTL_EXT_EN		2		/* Enable external targets */
 #define  BCMA_CC_JCTL_EN		1		/* Enable Jtag master */
 #define BCMA_CC_FLASHCTL		0x0040
+
+/* Start/busy bit in flashcontrol */
+#define  BCMA_CC_FLASHCTL_OPCODE	0x000000ff
+#define  BCMA_CC_FLASHCTL_ACTION	0x00000700
+#define  BCMA_CC_FLASHCTL_CS_ACTIVE	0x00001000	/* Chip Select Active, rev >= 20 */
 #define  BCMA_CC_FLASHCTL_START		0x80000000
 #define  BCMA_CC_FLASHCTL_BUSY		BCMA_CC_FLASHCTL_START
+
+/* flashcontrol action+opcodes for ST flashes */
+#define  BCMA_CC_FLASHCTL_ST_WREN	0x0006		/* Write Enable */
+#define  BCMA_CC_FLASHCTL_ST_WRDIS	0x0004		/* Write Disable */
+#define  BCMA_CC_FLASHCTL_ST_RDSR	0x0105		/* Read Status Register */
+#define  BCMA_CC_FLASHCTL_ST_WRSR	0x0101		/* Write Status Register */
+#define  BCMA_CC_FLASHCTL_ST_READ	0x0303		/* Read Data Bytes */
+#define  BCMA_CC_FLASHCTL_ST_PP		0x0302		/* Page Program */
+#define  BCMA_CC_FLASHCTL_ST_SE		0x02d8		/* Sector Erase */
+#define  BCMA_CC_FLASHCTL_ST_BE		0x00c7		/* Bulk Erase */
+#define  BCMA_CC_FLASHCTL_ST_DP		0x00b9		/* Deep Power-down */
+#define  BCMA_CC_FLASHCTL_ST_RES	0x03ab		/* Read Electronic Signature */
+#define  BCMA_CC_FLASHCTL_ST_CSA	0x1000		/* Keep chip select asserted */
+#define  BCMA_CC_FLASHCTL_ST_SSE	0x0220		/* Sub-sector Erase */
+
+
+/* flashcontrol action+opcodes for Atmel flashes */
+#define  BCMA_CC_FLASHCTL_AT_READ			0x07e8
+#define  BCMA_CC_FLASHCTL_AT_PAGE_READ			0x07d2
+#define  BCMA_CC_FLASHCTL_AT_BUF1_READ
+#define  BCMA_CC_FLASHCTL_AT_BUF2_READ
+#define  BCMA_CC_FLASHCTL_AT_STATUS			0x01d7
+#define  BCMA_CC_FLASHCTL_AT_BUF1_WRITE			0x0384
+#define  BCMA_CC_FLASHCTL_AT_BUF2_WRITE			0x0387
+#define  BCMA_CC_FLASHCTL_AT_BUF1_ERASE_PROGRAM		0x0283
+#define  BCMA_CC_FLASHCTL_AT_BUF2_ERASE_PROGRAM		0x0286
+#define  BCMA_CC_FLASHCTL_AT_BUF1_PROGRAM		0x0288
+#define  BCMA_CC_FLASHCTL_AT_BUF2_PROGRAM		0x0289
+#define  BCMA_CC_FLASHCTL_AT_PAGE_ERASE			0x0281
+#define  BCMA_CC_FLASHCTL_AT_BLOCK_ERASE		0x0250
+#define  BCMA_CC_FLASHCTL_AT_BUF1_WRITE_ERASE_PROGRAM	0x0382
+#define  BCMA_CC_FLASHCTL_AT_BUF2_WRITE_ERASE_PROGRAM	0x0385
+#define  BCMA_CC_FLASHCTL_AT_BUF1_LOAD			0x0253
+#define  BCMA_CC_FLASHCTL_AT_BUF2_LOAD			0x0255
+#define  BCMA_CC_FLASHCTL_AT_BUF1_COMPARE		0x0260
+#define  BCMA_CC_FLASHCTL_AT_BUF2_COMPARE		0x0261
+#define  BCMA_CC_FLASHCTL_AT_BUF1_REPROGRAM		0x0258
+#define  BCMA_CC_FLASHCTL_AT_BUF2_REPROGRAM		0x0259
+
 #define BCMA_CC_FLASHADDR		0x0044
 #define BCMA_CC_FLASHDATA		0x0048
+
+/* Status register bits for ST flashes */
+#define  BCMA_CC_FLASHDATA_ST_WIP	0x01		/* Write In Progress */
+#define  BCMA_CC_FLASHDATA_ST_WEL	0x02		/* Write Enable Latch */
+#define  BCMA_CC_FLASHDATA_ST_BP_MASK	0x1c		/* Block Protect */
+#define  BCMA_CC_FLASHDATA_ST_BP_SHIFT	2
+#define  BCMA_CC_FLASHDATA_ST_SRWD	0x80		/* Status Register Write Disable */
+
+/* Status register bits for Atmel flashes */
+#define  BCMA_CC_FLASHDATA_AT_READY	0x80
+#define  BCMA_CC_FLASHDATA_AT_MISMATCH	0x40
+#define  BCMA_CC_FLASHDATA_AT_ID_MASK	0x38
+#define  BCMA_CC_FLASHDATA_AT_ID_SHIFT	3
+
 #define BCMA_CC_BCAST_ADDR		0x0050
 #define BCMA_CC_BCAST_DATA		0x0054
 #define BCMA_CC_GPIOPULLUP		0x0058		/* Rev >= 20 only */
@@ -283,6 +341,12 @@
 #define BCMA_CC_PPL_PCHI_OFF		5
 #define BCMA_CC_PPL_PCHI_MASK		0x0000003f
 
+#define	BCMA_FLASH2			0x1c000000	/* Flash Region 2 (region 1 shadowed here) */
+#define	BCMA_FLASH2_SZ			0x02000000	/* Size of Flash Region 2 */
+#define	BCMA_FLASH1			0x1fc00000	/* MIPS Flash Region 1 */
+#define	BCMA_FLASH1_SZ			0x00400000	/* MIPS Size of Flash Region 1 */
+
+
 /* Data for the PMU, if available.
  * Check availability with ((struct bcma_chipcommon)->capabilities & BCMA_CC_CAP_PMU)
  */
@@ -292,12 +356,20 @@ struct bcma_chipcommon_pmu {
 };
 
 #ifdef CONFIG_BCMA_DRIVER_MIPS
+enum bcma_flash_type {
+	BCMA_PFLASH,
+};
+
 struct bcma_pflash {
 	u8 buswidth;
 	u32 window;
 	u32 window_size;
 };
 
+union bcma_flash {
+	struct bcma_pflash pflash;
+};
+
 struct bcma_serial_port {
 	void *regs;
 	unsigned long clockspeed;
@@ -317,7 +389,8 @@ struct bcma_drv_cc {
 	u16 fast_pwrup_delay;
 	struct bcma_chipcommon_pmu pmu;
 #ifdef CONFIG_BCMA_DRIVER_MIPS
-	struct bcma_pflash pflash;
+	enum bcma_flash_type flash_type;
+	union bcma_flash flash;
 
 	int nr_serial_ports;
 	struct bcma_serial_port serial_ports[4];