| 1 | /* |
| 2 | * drivers/pcmcia/sa1100_shannon.c |
| 3 | * |
| 4 | * PCMCIA implementation routines for Shannon |
| 5 | * |
| 6 | */ |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/device.h> |
| 10 | #include <linux/init.h> |
| 11 | |
| 12 | #include <mach/hardware.h> |
| 13 | #include <asm/mach-types.h> |
| 14 | #include <mach/shannon.h> |
| 15 | #include <asm/irq.h> |
| 16 | #include "sa1100_generic.h" |
| 17 | |
| 18 | static struct pcmcia_irqs irqs[] = { |
| 19 | { 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" }, |
| 20 | { 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" }, |
| 21 | }; |
| 22 | |
| 23 | static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 24 | { |
| 25 | /* All those are inputs */ |
| 26 | GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 | |
| 27 | SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1); |
| 28 | GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 | |
| 29 | SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1); |
| 30 | |
| 31 | skt->irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0; |
| 32 | |
| 33 | return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 34 | } |
| 35 | |
| 36 | static void shannon_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
| 37 | { |
| 38 | soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 39 | } |
| 40 | |
| 41 | static void |
| 42 | shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 43 | struct pcmcia_state *state) |
| 44 | { |
| 45 | unsigned long levels = GPLR; |
| 46 | |
| 47 | switch (skt->nr) { |
| 48 | case 0: |
| 49 | state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1; |
| 50 | state->ready = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0; |
| 51 | state->wrprot = 0; /* Not available on Shannon. */ |
| 52 | state->bvd1 = 1; |
| 53 | state->bvd2 = 1; |
| 54 | state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */ |
| 55 | state->vs_Xv = 0; |
| 56 | break; |
| 57 | |
| 58 | case 1: |
| 59 | state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1; |
| 60 | state->ready = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0; |
| 61 | state->wrprot = 0; /* Not available on Shannon. */ |
| 62 | state->bvd1 = 1; |
| 63 | state->bvd2 = 1; |
| 64 | state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */ |
| 65 | state->vs_Xv = 0; |
| 66 | break; |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | static int |
| 71 | shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 72 | const socket_state_t *state) |
| 73 | { |
| 74 | switch (state->Vcc) { |
| 75 | case 0: /* power off */ |
| 76 | printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__); |
| 77 | break; |
| 78 | case 50: |
| 79 | printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __func__); |
| 80 | case 33: |
| 81 | break; |
| 82 | default: |
| 83 | printk(KERN_ERR "%s(): unrecognized Vcc %u\n", |
| 84 | __func__, state->Vcc); |
| 85 | return -1; |
| 86 | } |
| 87 | |
| 88 | printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__); |
| 89 | |
| 90 | /* Silently ignore Vpp, output enable, speaker enable. */ |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
| 96 | { |
| 97 | soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 98 | } |
| 99 | |
| 100 | static void shannon_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
| 101 | { |
| 102 | soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 103 | } |
| 104 | |
| 105 | static struct pcmcia_low_level shannon_pcmcia_ops = { |
| 106 | .owner = THIS_MODULE, |
| 107 | .hw_init = shannon_pcmcia_hw_init, |
| 108 | .hw_shutdown = shannon_pcmcia_hw_shutdown, |
| 109 | .socket_state = shannon_pcmcia_socket_state, |
| 110 | .configure_socket = shannon_pcmcia_configure_socket, |
| 111 | |
| 112 | .socket_init = shannon_pcmcia_socket_init, |
| 113 | .socket_suspend = shannon_pcmcia_socket_suspend, |
| 114 | }; |
| 115 | |
| 116 | int __init pcmcia_shannon_init(struct device *dev) |
| 117 | { |
| 118 | int ret = -ENODEV; |
| 119 | |
| 120 | if (machine_is_shannon()) |
| 121 | ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2); |
| 122 | |
| 123 | return ret; |
| 124 | } |