* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*/
-
+#include <linux/cs5535.h>
+#include <linux/gpio.h>
#include <asm/olpc.h>
#include "olpc_dcon.h"
-/* Base address of the GPIO registers */
-static unsigned long gpio_base;
-
-/*
- * List of GPIOs that we care about:
- * (in) GPIO12 -- DCONBLANK
- * (in) GPIO[56] -- DCONSTAT[01]
- * (out) GPIO11 -- DCONLOAD
- */
-
-#define IN_GPIOS ((1<<5) | (1<<6) | (1<<7) | (1<<12))
-#define OUT_GPIOS (1<<11)
-
static int dcon_init_xo_1(void)
{
- unsigned long lo, hi;
unsigned char lob;
- rdmsr(MSR_LBAR_GPIO, lo, hi);
-
- /* Check the mask and whether GPIO is enabled (sanity check) */
- if (hi != 0x0000f001) {
- printk(KERN_ERR "GPIO not enabled -- cannot use DCON\n");
- return -ENODEV;
+ if (gpio_request(OLPC_GPIO_DCON_STAT0, "OLPC-DCON")) {
+ printk(KERN_ERR "olpc-dcon: failed to request STAT0 GPIO\n");
+ return -EIO;
+ }
+ if (gpio_request(OLPC_GPIO_DCON_STAT1, "OLPC-DCON")) {
+ printk(KERN_ERR "olpc-dcon: failed to request STAT1 GPIO\n");
+ goto err_gp_stat1;
+ }
+ if (gpio_request(OLPC_GPIO_DCON_IRQ, "OLPC-DCON")) {
+ printk(KERN_ERR "olpc-dcon: failed to request IRQ GPIO\n");
+ goto err_gp_irq;
+ }
+ if (gpio_request(OLPC_GPIO_DCON_LOAD, "OLPC-DCON")) {
+ printk(KERN_ERR "olpc-dcon: failed to request LOAD GPIO\n");
+ goto err_gp_load;
+ }
+ if (gpio_request(OLPC_GPIO_DCON_BLANK, "OLPC-DCON")) {
+ printk(KERN_ERR "olpc-dcon: failed to request BLANK GPIO\n");
+ goto err_gp_blank;
}
-
- /* Mask off the IO base address */
- gpio_base = lo & 0x0000ff00;
/* Turn off the event enable for GPIO7 just to be safe */
- outl(1 << (16+7), gpio_base + GPIOx_EVNT_EN);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE);
+
+ /*
+ * Determine the current state by reading the GPIO bit; earlier
+ * stages of the boot process have established the state.
+ *
+ * Note that we read GPIO_OUPUT_VAL rather than GPIO_READ_BACK here;
+ * this is because OFW will disable input for the pin and set a value..
+ * READ_BACK will only contain a valid value if input is enabled and
+ * then a value is set. So, future readings of the pin can use
+ * READ_BACK, but the first one cannot. Awesome, huh?
+ */
+ dcon_source = cs5535_gpio_isset(OLPC_GPIO_DCON_LOAD, GPIO_OUTPUT_VAL)
+ ? DCON_SOURCE_CPU
+ : DCON_SOURCE_DCON;
+ dcon_pending = dcon_source;
/* Set the directions for the GPIO pins */
- outl(OUT_GPIOS | (IN_GPIOS << 16), gpio_base + GPIOx_OUT_EN);
- outl(IN_GPIOS | (OUT_GPIOS << 16), gpio_base + GPIOx_IN_EN);
+ gpio_direction_input(OLPC_GPIO_DCON_STAT0);
+ gpio_direction_input(OLPC_GPIO_DCON_STAT1);
+ gpio_direction_input(OLPC_GPIO_DCON_IRQ);
+ gpio_direction_input(OLPC_GPIO_DCON_BLANK);
+ gpio_direction_output(OLPC_GPIO_DCON_LOAD,
+ dcon_source == DCON_SOURCE_CPU);
/* Set up the interrupt mappings */
/* Set the IRQ to pair 2 */
- geode_gpio_event_irq(OLPC_GPIO_DCON_IRQ, 2);
+ cs5535_gpio_setup_event(OLPC_GPIO_DCON_IRQ, 2, 0);
/* Enable group 2 to trigger the DCON interrupt */
- geode_gpio_set_irq(2, DCON_IRQ);
+ cs5535_gpio_set_irq(2, DCON_IRQ);
/* Select edge level for interrupt (in PIC) */
lob = inb(0x4d0);
outb(lob, 0x4d0);
/* Register the interupt handler */
- if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", &dcon_driver))
- return -EIO;
+ if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", &dcon_driver)) {
+ printk(KERN_ERR "olpc-dcon: failed to request DCON's irq\n");
+ goto err_req_irq;
+ }
/* Clear INV_EN for GPIO7 (DCONIRQ) */
- outl((1<<(16+7)), gpio_base + GPIOx_INV_EN);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_INVERT);
/* Enable filter for GPIO12 (DCONBLANK) */
- outl(1<<(12), gpio_base + GPIOx_IN_FLTR_EN);
+ cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_FILTER);
/* Disable filter for GPIO7 */
- outl(1<<(16+7), gpio_base + GPIOx_IN_FLTR_EN);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_FILTER);
/* Disable event counter for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */
-
- outl(1<<(16+7), gpio_base + GPIOx_EVNTCNT_EN);
- outl(1<<(16+12), gpio_base + GPIOx_EVNTCNT_EN);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_EVENT_COUNT);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_EVENT_COUNT);
/* Add GPIO12 to the Filter Event Pair #7 */
- outb(12, gpio_base + GPIO_FE7_SEL);
+ cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_FE7_SEL);
/* Turn off negative Edge Enable for GPIO12 */
- outl(1<<(16+12), gpio_base + GPIOx_NEGEDGE_EN);
+ cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_EN);
/* Enable negative Edge Enable for GPIO7 */
- outl(1<<7, gpio_base + GPIOx_NEGEDGE_EN);
+ cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_EN);
/* Zero the filter amount for Filter Event Pair #7 */
- outw(0, gpio_base + GPIO_FLT7_AMNT);
+ cs5535_gpio_set(0, GPIO_FLTR7_AMOUNT);
/* Clear the negative edge status for GPIO7 and GPIO12 */
- outl((1<<7) | (1<<12), gpio_base+0x4c);
+ cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS);
+ cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_STS);
/* FIXME: Clear the posiitive status as well, just to be sure */
- outl((1<<7) | (1<<12), gpio_base+0x48);
+ cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_POSITIVE_EDGE_STS);
+ cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_POSITIVE_EDGE_STS);
/* Enable events for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */
- outl((1<<(7))|(1<<12), gpio_base + GPIOx_EVNT_EN);
-
- /* Determine the current state by reading the GPIO bit */
- /* Earlier stages of the boot process have established the state */
- dcon_source = inl(gpio_base + GPIOx_OUT_VAL) & (1<<11)
- ? DCON_SOURCE_CPU
- : DCON_SOURCE_DCON;
- dcon_pending = dcon_source;
+ cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE);
+ cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_EVENTS_ENABLE);
return 0;
+
+err_req_irq:
+ gpio_free(OLPC_GPIO_DCON_BLANK);
+err_gp_blank:
+ gpio_free(OLPC_GPIO_DCON_LOAD);
+err_gp_load:
+ gpio_free(OLPC_GPIO_DCON_IRQ);
+err_gp_irq:
+ gpio_free(OLPC_GPIO_DCON_STAT1);
+err_gp_stat1:
+ gpio_free(OLPC_GPIO_DCON_STAT0);
+ return -EIO;
}
static void dcon_wiggle_xo_1(void)
* simultaneously set AUX1 IN/OUT to GPIO14; ditto for SMB_DATA and
* GPIO15.
*/
- geode_gpio_set(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_VAL);
- geode_gpio_set(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_ENABLE);
- geode_gpio_clear(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1);
- geode_gpio_clear(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX2);
- geode_gpio_clear(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1);
+ cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL);
+ cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_VAL);
+ cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_ENABLE);
+ cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_ENABLE);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX1);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX2);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX2);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_INPUT_AUX1);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1);
for (x = 0; x < 16; x++) {
udelay(5);
- geode_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL);
+ cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL);
udelay(5);
- geode_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL);
+ cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL);
}
udelay(5);
- geode_gpio_set(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1);
- geode_gpio_set(OLPC_GPIO_SMB_CLK|OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1);
+ cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX1);
+ cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1);
+ cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_INPUT_AUX1);
+ cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1);
}
static void dcon_set_dconload_1(int val)
{
- if (val)
- outl(1<<11, gpio_base + GPIOx_OUT_VAL);
- else
- outl(1<<(11 + 16), gpio_base + GPIOx_OUT_VAL);
+ gpio_set_value(OLPC_GPIO_DCON_LOAD, val);
}
-static int dcon_read_status_xo_1(void)
+static u8 dcon_read_status_xo_1(void)
{
- int status = inl(gpio_base + GPIOx_READ_BACK) >> 5;
-
+ u8 status;
+
+ status = gpio_get_value(OLPC_GPIO_DCON_STAT0);
+ status |= gpio_get_value(OLPC_GPIO_DCON_STAT1) << 1;
+
/* Clear the negative edge status for GPIO7 */
- outl(1 << 7, gpio_base + GPIOx_NEGEDGE_STS);
+ cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS);
return status;
}
projects / mv-sheeva.git / blobdiff