sa1100_yopy.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * drivers/pcmcia/sa1100_yopy.c
- *
- * PCMCIA implementation routines for Yopy
- *
- */
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/hardware.h>
- #include <asm/irq.h>
- #include "sa1100_generic.h"
- static inline void pcmcia_power(int on) {
- /* high for power up */
- yopy_gpio_set(GPIO_CF_POWER, on);
- }
- static inline void pcmcia_reset(int reset)
- {
- /* high for reset */
- yopy_gpio_set(GPIO_CF_RESET, reset);
- }
- static int yopy_pcmcia_init(struct pcmcia_init *init)
- {
- int irq, res;
- pcmcia_power(0);
- pcmcia_reset(1);
- /* Set transition detect */
- set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
- GPIO_NO_EDGES);
- set_GPIO_IRQ_edge( GPIO_CF_IREQ, GPIO_FALLING_EDGE );
- /* Register interrupts */
- irq = IRQ_CF_CD;
- res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_CD", NULL);
- if (res < 0) goto irq_err;
- irq = IRQ_CF_BVD2;
- res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD2", NULL);
- if (res < 0) goto irq_err;
- irq = IRQ_CF_BVD1;
- res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL);
- if (res < 0) goto irq_err;
- return 1;
- irq_err:
- printk(KERN_ERR "%s: Request for IRQ %d failedn", __FUNCTION__, irq);
- return -1;
- }
- static int yopy_pcmcia_shutdown(void)
- {
- /* disable IRQs */
- free_irq( IRQ_CF_CD, NULL );
- free_irq( IRQ_CF_BVD2, NULL );
- free_irq( IRQ_CF_BVD1, NULL );
- /* Disable CF */
- pcmcia_reset(1);
- pcmcia_power(0);
- return 0;
- }
- static int yopy_pcmcia_socket_state(struct pcmcia_state_array *state_array)
- {
- unsigned long levels;
- if (state_array->size != 1)
- return -1;
- memset(state_array->state, 0,
- state_array->size * sizeof(struct pcmcia_state));
- levels = GPLR;
- state_array->state[0].detect = (levels & GPIO_CF_CD) ? 0 : 1;
- state_array->state[0].ready = (levels & GPIO_CF_READY) ? 1 : 0;
- state_array->state[0].bvd1 = (levels & GPIO_CF_BVD1) ? 1 : 0;
- state_array->state[0].bvd2 = (levels & GPIO_CF_BVD2) ? 1 : 0;
- state_array->state[0].wrprot = 0; /* Not available on Yopy. */
- state_array->state[0].vs_3v = 0; /* FIXME Can only apply 3.3V on Yopy. */
- state_array->state[0].vs_Xv = 0;
- return 1;
- }
- static int yopy_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
- {
- if (info->sock != 0)
- return -1;
- info->irq = IRQ_CF_IREQ;
- return 0;
- }
- static int yopy_pcmcia_configure_socket(const struct pcmcia_configure *configure)
- {
- if (configure->sock != 0)
- return -1;
- switch (configure->vcc) {
- case 0: /* power off */;
- pcmcia_power(0);
- break;
- case 50:
- printk(KERN_WARNING __FUNCTION__"(): CS asked for 5V, applying 3.3V..n");
- case 33:
- pcmcia_power(1);
- break;
- default:
- printk(KERN_ERR __FUNCTION__"(): unrecognized Vcc %un",
- configure->vcc);
- return -1;
- }
- pcmcia_reset(configure->reset);
- /* Silently ignore Vpp, output enable, speaker enable. */
- return 0;
- }
- static int yopy_pcmcia_socket_init(int sock)
- {
- set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
- GPIO_BOTH_EDGES);
- return 0;
- }
- static int yopy_pcmcia_socket_suspend(int sock)
- {
- set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
- GPIO_NO_EDGES);
- return 0;
- }
- struct pcmcia_low_level yopy_pcmcia_ops = {
- init: yopy_pcmcia_init,
- shutdown: yopy_pcmcia_shutdown,
- socket_state: yopy_pcmcia_socket_state,
- get_irq_info: yopy_pcmcia_get_irq_info,
- configure_socket: yopy_pcmcia_configure_socket,
- socket_init: yopy_pcmcia_socket_init,
- socket_suspend: yopy_pcmcia_socket_suspend,
- };