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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2007-10-22 18:32:14 +0200
committerHaavard Skinnemoen <hskinnemoen@atmel.com>2007-10-23 11:20:05 +0200
commiteaf5f925a31973e2fdc50c785665b90ff444eceb (patch)
tree68cfd362cc740aebe06a857a96b80d5446d4467a /arch/avr32
parent2042c1c4e7a5e3b69ff3c3c5db6bf6416abd8b24 (diff)
downloadop-kernel-dev-eaf5f925a31973e2fdc50c785665b90ff444eceb.zip
op-kernel-dev-eaf5f925a31973e2fdc50c785665b90ff444eceb.tar.gz
[AVR32] Implement at32_add_device_cf()
Implement at32_add_device_cf() which will add a platform_device for the at32_cf driver (not merged yet). Separate out most of the at32_add_device_ide() code and use it to implement at32_add_device_cf() as well. This changes the API in the following ways: * The board code must initialize data->cs to the chipselect ID to use before calling any of these functions. * The board code must use GPIO_PIN_NONE to indicate unused CF pins. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/mach-at32ap/at32ap7000.c133
1 files changed, 102 insertions, 31 deletions
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index d152504..a9d9ec0 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -1330,10 +1330,9 @@ out_free_pdev:
}
/* --------------------------------------------------------------------
- * IDE
+ * IDE / CompactFlash
* -------------------------------------------------------------------- */
-static struct ide_platform_data at32_ide0_data;
-static struct resource at32_ide0_resource[] = {
+static struct resource at32_smc_cs4_resource[] __initdata = {
{
.start = 0x04000000,
.end = 0x07ffffff,
@@ -1341,45 +1340,63 @@ static struct resource at32_ide0_resource[] = {
},
IRQ(~0UL), /* Magic IRQ will be overridden */
};
-DEFINE_DEV_DATA(at32_ide, 0);
+static struct resource at32_smc_cs5_resource[] __initdata = {
+ {
+ .start = 0x20000000,
+ .end = 0x23ffffff,
+ .flags = IORESOURCE_MEM,
+ },
+ IRQ(~0UL), /* Magic IRQ will be overridden */
+};
-struct platform_device *__init
-at32_add_device_ide(unsigned int id, unsigned int extint,
- struct ide_platform_data *data)
+static int __init at32_init_ide_or_cf(struct platform_device *pdev,
+ unsigned int cs, unsigned int extint)
{
- struct platform_device *pdev;
+ static unsigned int extint_pin_map[4] __initdata = {
+ GPIO_PIN_PB(25),
+ GPIO_PIN_PB(26),
+ GPIO_PIN_PB(27),
+ GPIO_PIN_PB(28),
+ };
+ static bool common_pins_initialized __initdata = false;
unsigned int extint_pin;
+ int ret;
- switch (extint) {
- case 0:
- extint_pin = GPIO_PIN_PB(25);
- break;
- case 1:
- extint_pin = GPIO_PIN_PB(26);
- break;
- case 2:
- extint_pin = GPIO_PIN_PB(27);
+ if (extint >= ARRAY_SIZE(extint_pin_map))
+ return -EINVAL;
+ extint_pin = extint_pin_map[extint];
+
+ switch (cs) {
+ case 4:
+ ret = platform_device_add_resources(pdev,
+ at32_smc_cs4_resource,
+ ARRAY_SIZE(at32_smc_cs4_resource));
+ if (ret)
+ return ret;
+
+ select_peripheral(PE(21), PERIPH_A, 0); /* NCS4 -> OE_N */
+ set_ebi_sfr_bits(HMATRIX_BIT(CS4A));
break;
- case 3:
- extint_pin = GPIO_PIN_PB(28);
+ case 5:
+ ret = platform_device_add_resources(pdev,
+ at32_smc_cs5_resource,
+ ARRAY_SIZE(at32_smc_cs5_resource));
+ if (ret)
+ return ret;
+
+ select_peripheral(PE(22), PERIPH_A, 0); /* NCS5 -> OE_N */
+ set_ebi_sfr_bits(HMATRIX_BIT(CS5A));
break;
default:
- return NULL;
+ return -EINVAL;
}
- switch (id) {
- case 0:
- pdev = &at32_ide0_device;
+ if (!common_pins_initialized) {
select_peripheral(PE(19), PERIPH_A, 0); /* CFCE1 -> CS0_N */
select_peripheral(PE(20), PERIPH_A, 0); /* CFCE2 -> CS1_N */
- select_peripheral(PE(21), PERIPH_A, 0); /* NCS4 -> OE_N */
select_peripheral(PE(23), PERIPH_A, 0); /* CFRNW -> DIR */
select_peripheral(PE(24), PERIPH_A, 0); /* NWAIT <- IORDY */
- set_ebi_sfr_bits(HMATRIX_BIT(CS4A));
- data->cs = 4;
- break;
- default:
- return NULL;
+ common_pins_initialized = true;
}
at32_select_periph(extint_pin, GPIO_PERIPH_A, AT32_GPIOF_DEGLITCH);
@@ -1387,11 +1404,65 @@ at32_add_device_ide(unsigned int id, unsigned int extint,
pdev->resource[1].start = EIM_IRQ_BASE + extint;
pdev->resource[1].end = pdev->resource[1].start;
- memcpy(pdev->dev.platform_data, data, sizeof(struct ide_platform_data));
+ return 0;
+}
- platform_device_register(pdev);
+struct platform_device *__init
+at32_add_device_ide(unsigned int id, unsigned int extint,
+ struct ide_platform_data *data)
+{
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("at32_ide", id);
+ if (!pdev)
+ goto fail;
+
+ if (platform_device_add_data(pdev, data,
+ sizeof(struct ide_platform_data)))
+ goto fail;
+
+ if (at32_init_ide_or_cf(pdev, data->cs, extint))
+ goto fail;
+
+ platform_device_add(pdev);
+ return pdev;
+
+fail:
+ platform_device_put(pdev);
+ return NULL;
+}
+
+struct platform_device *__init
+at32_add_device_cf(unsigned int id, unsigned int extint,
+ struct cf_platform_data *data)
+{
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("at32_cf", id);
+ if (!pdev)
+ goto fail;
+ if (platform_device_add_data(pdev, data,
+ sizeof(struct cf_platform_data)))
+ goto fail;
+
+ if (at32_init_ide_or_cf(pdev, data->cs, extint))
+ goto fail;
+
+ if (data->detect_pin != GPIO_PIN_NONE)
+ at32_select_gpio(data->detect_pin, AT32_GPIOF_DEGLITCH);
+ if (data->reset_pin != GPIO_PIN_NONE)
+ at32_select_gpio(data->reset_pin, 0);
+ if (data->vcc_pin != GPIO_PIN_NONE)
+ at32_select_gpio(data->vcc_pin, 0);
+ /* READY is used as extint, so we can't select it as gpio */
+
+ platform_device_add(pdev);
return pdev;
+
+fail:
+ platform_device_put(pdev);
+ return NULL;
}
/* --------------------------------------------------------------------
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