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-rw-r--r--arch/arm/mach-omap2/gpmc-nand.c28
-rw-r--r--arch/arm/mach-omap2/gpmc-onenand.c23
-rw-r--r--arch/arm/mach-omap2/gpmc.c156
-rw-r--r--arch/arm/plat-omap/include/plat/gpmc.h19
-rw-r--r--arch/arm/plat-omap/include/plat/nand.h2
5 files changed, 204 insertions, 24 deletions
diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index 386dec8d2351..045596a3e899 100644
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -21,15 +21,23 @@
#include <plat/board.h>
#include <plat/gpmc.h>
-static struct resource gpmc_nand_resource = {
- .flags = IORESOURCE_MEM,
+static struct resource gpmc_nand_resource[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .flags = IORESOURCE_IRQ,
+ },
};
static struct platform_device gpmc_nand_device = {
.name = "omap2-nand",
.id = 0,
- .num_resources = 1,
- .resource = &gpmc_nand_resource,
+ .num_resources = ARRAY_SIZE(gpmc_nand_resource),
+ .resource = gpmc_nand_resource,
};
static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data)
@@ -75,6 +83,7 @@ static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data
gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
gpmc_cs_configure(gpmc_nand_data->cs,
GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
+ gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_WP, 0);
err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
if (err)
return err;
@@ -90,12 +99,19 @@ int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
gpmc_nand_device.dev.platform_data = gpmc_nand_data;
err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
- &gpmc_nand_data->phys_base);
+ (unsigned long *)&gpmc_nand_resource[0].start);
if (err < 0) {
dev_err(dev, "Cannot request GPMC CS\n");
return err;
}
+ gpmc_nand_resource[0].end = gpmc_nand_resource[0].start +
+ NAND_IO_SIZE - 1;
+
+ gpmc_nand_resource[1].start =
+ gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
+ gpmc_nand_resource[2].start =
+ gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
/* Set timings in GPMC */
err = omap2_nand_gpmc_retime(gpmc_nand_data);
if (err < 0) {
@@ -108,6 +124,8 @@ int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
}
+ gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs);
+
err = platform_device_register(&gpmc_nand_device);
if (err < 0) {
dev_err(dev, "Unable to register NAND device\n");
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index a0fa9bb2bda5..71d7c07dd350 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -23,11 +23,19 @@
#include <plat/board.h>
#include <plat/gpmc.h>
+#define ONENAND_IO_SIZE SZ_128K
+
static struct omap_onenand_platform_data *gpmc_onenand_data;
+static struct resource gpmc_onenand_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
static struct platform_device gpmc_onenand_device = {
.name = "omap2-onenand",
.id = -1,
+ .num_resources = 1,
+ .resource = &gpmc_onenand_resource,
};
static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base)
@@ -390,6 +398,8 @@ static int gpmc_onenand_setup(void __iomem *onenand_base, int *freq_ptr)
void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
{
+ int err;
+
gpmc_onenand_data = _onenand_data;
gpmc_onenand_data->onenand_setup = gpmc_onenand_setup;
gpmc_onenand_device.dev.platform_data = gpmc_onenand_data;
@@ -401,8 +411,19 @@ void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
gpmc_onenand_data->flags |= ONENAND_SYNC_READ;
}
+ err = gpmc_cs_request(gpmc_onenand_data->cs, ONENAND_IO_SIZE,
+ (unsigned long *)&gpmc_onenand_resource.start);
+ if (err < 0) {
+ pr_err("%s: Cannot request GPMC CS\n", __func__);
+ return;
+ }
+
+ gpmc_onenand_resource.end = gpmc_onenand_resource.start +
+ ONENAND_IO_SIZE - 1;
+
if (platform_device_register(&gpmc_onenand_device) < 0) {
- printk(KERN_ERR "Unable to register OneNAND device\n");
+ pr_err("%s: Unable to register OneNAND device\n", __func__);
+ gpmc_cs_free(gpmc_onenand_data->cs);
return;
}
}
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index b2b5759ab0fe..39c30d9bafd9 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -78,6 +78,15 @@
#define ENABLE_PREFETCH (0x1 << 7)
#define DMA_MPU_MODE 2
+/* XXX: Only NAND irq has been considered,currently these are the only ones used
+ */
+#define GPMC_NR_IRQ 2
+
+struct gpmc_client_irq {
+ unsigned irq;
+ u32 bitmask;
+};
+
/* Structure to save gpmc cs context */
struct gpmc_cs_config {
u32 config1;
@@ -105,6 +114,10 @@ struct omap3_gpmc_regs {
struct gpmc_cs_config cs_context[GPMC_CS_NUM];
};
+static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ];
+static struct irq_chip gpmc_irq_chip;
+static unsigned gpmc_irq_start;
+
static struct resource gpmc_mem_root;
static struct resource gpmc_cs_mem[GPMC_CS_NUM];
static DEFINE_SPINLOCK(gpmc_mem_lock);
@@ -682,6 +695,117 @@ int gpmc_prefetch_reset(int cs)
}
EXPORT_SYMBOL(gpmc_prefetch_reset);
+void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
+{
+ reg->gpmc_status = gpmc_base + GPMC_STATUS;
+ reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
+ GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
+ reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
+ GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
+ reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
+ GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
+ reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
+ reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
+ reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
+ reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
+ reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
+ reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
+ reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
+ reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;
+ reg->gpmc_bch_result0 = gpmc_base + GPMC_ECC_BCH_RESULT_0;
+}
+
+int gpmc_get_client_irq(unsigned irq_config)
+{
+ int i;
+
+ if (hweight32(irq_config) > 1)
+ return 0;
+
+ for (i = 0; i < GPMC_NR_IRQ; i++)
+ if (gpmc_client_irq[i].bitmask & irq_config)
+ return gpmc_client_irq[i].irq;
+
+ return 0;
+}
+
+static int gpmc_irq_endis(unsigned irq, bool endis)
+{
+ int i;
+ u32 regval;
+
+ for (i = 0; i < GPMC_NR_IRQ; i++)
+ if (irq == gpmc_client_irq[i].irq) {
+ regval = gpmc_read_reg(GPMC_IRQENABLE);
+ if (endis)
+ regval |= gpmc_client_irq[i].bitmask;
+ else
+ regval &= ~gpmc_client_irq[i].bitmask;
+ gpmc_write_reg(GPMC_IRQENABLE, regval);
+ break;
+ }
+
+ return 0;
+}
+
+static void gpmc_irq_disable(struct irq_data *p)
+{
+ gpmc_irq_endis(p->irq, false);
+}
+
+static void gpmc_irq_enable(struct irq_data *p)
+{
+ gpmc_irq_endis(p->irq, true);
+}
+
+static void gpmc_irq_noop(struct irq_data *data) { }
+
+static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; }
+
+static int gpmc_setup_irq(int gpmc_irq)
+{
+ int i;
+ u32 regval;
+
+ if (!gpmc_irq)
+ return -EINVAL;
+
+ gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0);
+ if (IS_ERR_VALUE(gpmc_irq_start)) {
+ pr_err("irq_alloc_descs failed\n");
+ return gpmc_irq_start;
+ }
+
+ gpmc_irq_chip.name = "gpmc";
+ gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret;
+ gpmc_irq_chip.irq_enable = gpmc_irq_enable;
+ gpmc_irq_chip.irq_disable = gpmc_irq_disable;
+ gpmc_irq_chip.irq_shutdown = gpmc_irq_noop;
+ gpmc_irq_chip.irq_ack = gpmc_irq_noop;
+ gpmc_irq_chip.irq_mask = gpmc_irq_noop;
+ gpmc_irq_chip.irq_unmask = gpmc_irq_noop;
+
+ gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE;
+ gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT;
+
+ for (i = 0; i < GPMC_NR_IRQ; i++) {
+ gpmc_client_irq[i].irq = gpmc_irq_start + i;
+ irq_set_chip_and_handler(gpmc_client_irq[i].irq,
+ &gpmc_irq_chip, handle_simple_irq);
+ set_irq_flags(gpmc_client_irq[i].irq,
+ IRQF_VALID | IRQF_NOAUTOEN);
+ }
+
+ /* Disable interrupts */
+ gpmc_write_reg(GPMC_IRQENABLE, 0);
+
+ /* clear interrupts */
+ regval = gpmc_read_reg(GPMC_IRQSTATUS);
+ gpmc_write_reg(GPMC_IRQSTATUS, regval);
+
+ return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL);
+}
+
static void __init gpmc_mem_init(void)
{
int cs;
@@ -711,8 +835,8 @@ static void __init gpmc_mem_init(void)
static int __init gpmc_init(void)
{
- u32 l, irq;
- int cs, ret = -EINVAL;
+ u32 l;
+ int ret = -EINVAL;
int gpmc_irq;
char *ck = NULL;
@@ -761,16 +885,7 @@ static int __init gpmc_init(void)
gpmc_write_reg(GPMC_SYSCONFIG, l);
gpmc_mem_init();
- /* initalize the irq_chained */
- irq = OMAP_GPMC_IRQ_BASE;
- for (cs = 0; cs < GPMC_CS_NUM; cs++) {
- irq_set_chip_and_handler(irq, &dummy_irq_chip,
- handle_simple_irq);
- set_irq_flags(irq, IRQF_VALID);
- irq++;
- }
-
- ret = request_irq(gpmc_irq, gpmc_handle_irq, IRQF_SHARED, "gpmc", NULL);
+ ret = gpmc_setup_irq(gpmc_irq);
if (ret)
pr_err("gpmc: irq-%d could not claim: err %d\n",
gpmc_irq, ret);
@@ -780,12 +895,19 @@ postcore_initcall(gpmc_init);
static irqreturn_t gpmc_handle_irq(int irq, void *dev)
{
- u8 cs;
+ int i;
+ u32 regval;
+
+ regval = gpmc_read_reg(GPMC_IRQSTATUS);
+
+ if (!regval)
+ return IRQ_NONE;
+
+ for (i = 0; i < GPMC_NR_IRQ; i++)
+ if (regval & gpmc_client_irq[i].bitmask)
+ generic_handle_irq(gpmc_client_irq[i].irq);
- /* check cs to invoke the irq */
- cs = ((gpmc_read_reg(GPMC_PREFETCH_CONFIG1)) >> CS_NUM_SHIFT) & 0x7;
- if (OMAP_GPMC_IRQ_BASE+cs <= OMAP_GPMC_IRQ_END)
- generic_handle_irq(OMAP_GPMC_IRQ_BASE+cs);
+ gpmc_write_reg(GPMC_IRQSTATUS, regval);
return IRQ_HANDLED;
}
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index f37764a36072..2e6e2597178c 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -133,6 +133,25 @@ struct gpmc_timings {
u16 wr_data_mux_bus; /* WRDATAONADMUXBUS */
};
+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;
+ void __iomem *gpmc_bch_result0;
+};
+
+extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
+extern int gpmc_get_client_irq(unsigned irq_config);
+
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 67fc5060183e..290cef5c1093 100644
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -26,9 +26,9 @@ struct omap_nand_platform_data {
bool dev_ready;
int gpmc_irq;
enum nand_io xfer_type;
- unsigned long phys_base;
int devsize;
enum omap_ecc ecc_opt;
+ struct gpmc_nand_regs reg;
};
/* minimum size for IO mapping */
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