sa1100_shannon.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- * drivers/pcmcia/sa1100_shannon.c
- *
- * PCMCIA implementation routines for Shannon
- *
- */
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/hardware.h>
- #include <asm/arch/shannon.h>
- #include <asm/irq.h>
- #include "sa1100_generic.h"
- static int shannon_pcmcia_init(struct pcmcia_init *init)
- {
- int irq, res;
- /* All those are inputs */
- GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
- SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
- GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
- SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
- /* Set transition detect */
- set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1, GPIO_NO_EDGES);
- set_GPIO_IRQ_edge(SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1, GPIO_FALLING_EDGE);
- /* Register interrupts */
- irq = SHANNON_IRQ_GPIO_EJECT_0;
- res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA_CD_0", NULL);
- if (res < 0) goto irq_err;
- irq = SHANNON_IRQ_GPIO_EJECT_1;
- res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA_CD_1", NULL);
- if (res < 0) goto irq_err;
- return 2;
- irq_err:
- printk(KERN_ERR "%s: Request for IRQ %d failedn", __FUNCTION__, irq);
- return -1;
- }
- static int shannon_pcmcia_shutdown(void)
- {
- /* disable IRQs */
- free_irq(SHANNON_IRQ_GPIO_EJECT_0, NULL);
- free_irq(SHANNON_IRQ_GPIO_EJECT_1, NULL);
- return 0;
- }
- static int shannon_pcmcia_socket_state(struct pcmcia_state_array *state_array)
- {
- unsigned long levels;
- memset(state_array->state, 0,
- state_array->size * sizeof(struct pcmcia_state));
- levels = GPLR;
- state_array->state[0].detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
- state_array->state[0].ready = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
- state_array->state[0].wrprot = 0; /* Not available on Shannon. */
- state_array->state[0].bvd1 = 1;
- state_array->state[0].bvd2 = 1;
- state_array->state[0].vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
- state_array->state[0].vs_Xv = 0;
- state_array->state[1].detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
- state_array->state[1].ready = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
- state_array->state[1].wrprot = 0; /* Not available on Shannon. */
- state_array->state[1].bvd1 = 1;
- state_array->state[1].bvd2 = 1;
- state_array->state[1].vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
- state_array->state[1].vs_Xv = 0;
- return 1;
- }
- static int shannon_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
- {
- if (info->sock == 0)
- info->irq = SHANNON_IRQ_GPIO_RDY_0;
- else if (info->sock == 1)
- info->irq = SHANNON_IRQ_GPIO_RDY_1;
- else return -1;
-
- return 0;
- }
- static int shannon_pcmcia_configure_socket(const struct pcmcia_configure *configure)
- {
- switch (configure->vcc) {
- case 0: /* power off */;
- printk(KERN_WARNING __FUNCTION__"(): CS asked for 0V, still applying 3.3V..n");
- break;
- case 50:
- printk(KERN_WARNING __FUNCTION__"(): CS asked for 5V, applying 3.3V..n");
- case 33:
- break;
- default:
- printk(KERN_ERR __FUNCTION__"(): unrecognized Vcc %un",
- configure->vcc);
- return -1;
- }
- printk(KERN_WARNING __FUNCTION__"(): Warning, Can't perform resetn");
-
- /* Silently ignore Vpp, output enable, speaker enable. */
- return 0;
- }
- static int shannon_pcmcia_socket_init(int sock)
- {
- if (sock == 0)
- set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0, GPIO_BOTH_EDGES);
- else if (sock == 1)
- set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_1, GPIO_BOTH_EDGES);
- return 0;
- }
- static int shannon_pcmcia_socket_suspend(int sock)
- {
- if (sock == 0)
- set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0, GPIO_NO_EDGES);
- else if (sock == 1)
- set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_1, GPIO_NO_EDGES);
- return 0;
- }
- struct pcmcia_low_level shannon_pcmcia_ops = {
- init: shannon_pcmcia_init,
- shutdown: shannon_pcmcia_shutdown,
- socket_state: shannon_pcmcia_socket_state,
- get_irq_info: shannon_pcmcia_get_irq_info,
- configure_socket: shannon_pcmcia_configure_socket,
- socket_init: shannon_pcmcia_socket_init,
- socket_suspend: shannon_pcmcia_socket_suspend,
- };