linux-kernel - [PATCH v3 2/9] ARM: OMAP2+: gpmc: registers for nand driver

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Message-ID: <a78d77dd5012e9d47616eeaf727e5b4265db0834.1333640054.git.afzal@ti.com>
Date:	Thu, 5 Apr 2012 21:16:08 +0530
From:	Afzal Mohammed <afzal@...com>
To:	<tony@...mide.com>, <khilman@...com>, <linux@....linux.org.uk>,
	<dwmw2@...radead.org>, <sameo@...ux.intel.com>,
	<grinberg@...pulab.co.il>, <mike@...pulab.co.il>, <nm@...com>,
	<artem.bityutskiy@...ux.intel.com>, <vimal.newwork@...il.com>,
	<dbaryshkov@...il.com>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:	Afzal Mohammed <afzal@...com>
Subject: [PATCH v3 2/9] ARM: OMAP2+: gpmc: registers for nand driver

If peripheral connected is NAND, update NAND drivers platform data
with NAND related register addresses so that NAND driver can handle
GPMC NAND operations by itself

Signed-off-by: Afzal Mohammed <afzal@...com>
---
 arch/arm/mach-omap2/gpmc.c             |   25 +++++++++++++++++++++++++
 arch/arm/plat-omap/include/plat/gpmc.h |   16 ++++++++++++++++
 arch/arm/plat-omap/include/plat/nand.h |    1 +
 3 files changed, 42 insertions(+)

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index cf5d8f3..ca7fa83 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -30,6 +30,7 @@
 
 #include <asm/mach-types.h>
 #include <plat/gpmc.h>
+#include <plat/nand.h>
 
 #include <plat/sdrc.h>
 
@@ -766,6 +767,28 @@ static int __init gpmc_init(void)
 }
 postcore_initcall(gpmc_init);
 
+static __devinit void gpmc_update_nand_reg(struct gpmc *gpmc,
+				struct omap_nand_platform_data *nand)
+{
+	int cs = nand->cs;
+
+	nand->reg.gpmc_status = gpmc->io_base + GPMC_STATUS;
+	nand->reg.gpmc_nand_command = gpmc->io_base + GPMC_CS0_OFFSET +
+				GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
+	nand->reg.gpmc_nand_address = gpmc->io_base + GPMC_CS0_OFFSET +
+				GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
+	nand->reg.gpmc_nand_data = gpmc->io_base + GPMC_CS0_OFFSET +
+				GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
+	nand->reg.gpmc_prefetch_config1 = gpmc->io_base + GPMC_PREFETCH_CONFIG1;
+	nand->reg.gpmc_prefetch_config2 = gpmc->io_base + GPMC_PREFETCH_CONFIG2;
+	nand->reg.gpmc_prefetch_control = gpmc->io_base + GPMC_PREFETCH_CONTROL;
+	nand->reg.gpmc_prefetch_status = gpmc->io_base + GPMC_PREFETCH_STATUS;
+	nand->reg.gpmc_ecc_config = gpmc->io_base + GPMC_ECC_CONFIG;
+	nand->reg.gpmc_ecc_control = gpmc->io_base + GPMC_ECC_CONTROL;
+	nand->reg.gpmc_ecc_size_config = gpmc->io_base + GPMC_ECC_SIZE_CONFIG;
+	nand->reg.gpmc_ecc1_result = gpmc->io_base + GPMC_ECC1_RESULT;
+}
+
 static __devinit struct resource gpmc_setup_cs_mem(struct gpmc_cs_data *p,
 			struct gpmc_device_pdata *gdp, struct gpmc *gpmc)
 {
@@ -1066,6 +1089,8 @@ static __devinit int gpmc_probe(struct platform_device *pdev)
 	gpmc_mem_init();
 
 	for (gdq = gp->device_pdata, gd = gpmc->device; *gdq; gdq++, i++) {
+		if ((*gdq)->is_nand)
+			gpmc_update_nand_reg(gpmc, (*gdq)->pdata);
 		ret = gpmc_setup_device(*gdq, gd, gpmc);
 		if (IS_ERR_VALUE(ret))
 			dev_err(gpmc->dev, "gpmc setup on %s failed\n",
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index fa62cdf..a320e71 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -169,6 +169,7 @@ struct gpmc_device_pdata {
 	unsigned		num_per_res;
 	struct gpmc_cs_data	*cs_data;
 	unsigned		num_cs;
+	bool			is_nand;
 };
 
 struct gpmc_pdata {
@@ -179,6 +180,21 @@ struct gpmc_pdata {
 	unsigned			num_irq;
 };
 
+struct gpmc_nand_regs {
+	void __iomem	*gpmc_status;
+	void __iomem	*gpmc_nand_command;
+	void __iomem	*gpmc_nand_address;
+	void __iomem	*gpmc_nand_data;
+	void __iomem	*gpmc_prefetch_config1;
+	void __iomem	*gpmc_prefetch_config2;
+	void __iomem	*gpmc_prefetch_control;
+	void __iomem	*gpmc_prefetch_status;
+	void __iomem	*gpmc_ecc_config;
+	void __iomem	*gpmc_ecc_control;
+	void __iomem	*gpmc_ecc_size_config;
+	void __iomem	*gpmc_ecc1_result;
+};
+
 extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
 extern unsigned int gpmc_ps_to_ticks(unsigned int time_ps);
 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
diff --git a/arch/arm/plat-omap/include/plat/nand.h b/arch/arm/plat-omap/include/plat/nand.h
index 67fc506..86e4d9c 100644
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -29,6 +29,7 @@ struct omap_nand_platform_data {
 	unsigned long		phys_base;
 	int			devsize;
 	enum omap_ecc           ecc_opt;
+	struct gpmc_nand_regs	reg;
 };
 
 /* minimum size for IO mapping */
-- 
1.7.9.3

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