diff options
Diffstat (limited to 'kernel/drivers/pcmcia/pxa2xx_mainstone.c')
| -rw-r--r-- | kernel/drivers/pcmcia/pxa2xx_mainstone.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/kernel/drivers/pcmcia/pxa2xx_mainstone.c b/kernel/drivers/pcmcia/pxa2xx_mainstone.c new file mode 100644 index 000000000..7e32e25cd --- /dev/null +++ b/kernel/drivers/pcmcia/pxa2xx_mainstone.c @@ -0,0 +1,170 @@ +/* + * linux/drivers/pcmcia/pxa2xx_mainstone.c + * + * Mainstone PCMCIA specific routines. + * + * Created: May 12, 2004 + * Author: Nicolas Pitre + * Copyright: MontaVista Software Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> + +#include <pcmcia/ss.h> + +#include <asm/mach-types.h> +#include <asm/irq.h> + +#include <mach/pxa2xx-regs.h> +#include <mach/mainstone.h> + +#include "soc_common.h" + + +static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + /* + * Setup default state of GPIO outputs + * before we enable them as outputs. + */ + if (skt->nr == 0) { + skt->socket.pci_irq = MAINSTONE_S0_IRQ; + skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ; + skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; + skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ; + skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG"; + } else { + skt->socket.pci_irq = MAINSTONE_S1_IRQ; + skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ; + skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD"; + skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ; + skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG"; + } + return 0; +} + +static unsigned long mst_pcmcia_status[2]; + +static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + unsigned long status, flip; + + status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1; + flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1; + + /* + * Workaround for STSCHG which can't be deasserted: + * We therefore disable/enable corresponding IRQs + * as needed to avoid IRQ locks. + */ + if (flip) { + mst_pcmcia_status[skt->nr] = status; + if (status & MST_PCMCIA_nSTSCHG_BVD1) + enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ + : MAINSTONE_S1_STSCHG_IRQ ); + else + disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ + : MAINSTONE_S1_STSCHG_IRQ ); + } + + state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1; + state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0; + state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0; + state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0; + state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1; + state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1; +} + +static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + unsigned long power = 0; + int ret = 0; + + switch (state->Vcc) { + case 0: power |= MST_PCMCIA_PWR_VCC_0; break; + case 33: power |= MST_PCMCIA_PWR_VCC_33; break; + case 50: power |= MST_PCMCIA_PWR_VCC_50; break; + default: + printk(KERN_ERR "%s(): bad Vcc %u\n", + __func__, state->Vcc); + ret = -1; + } + + switch (state->Vpp) { + case 0: power |= MST_PCMCIA_PWR_VPP_0; break; + case 120: power |= MST_PCMCIA_PWR_VPP_120; break; + default: + if(state->Vpp == state->Vcc) { + power |= MST_PCMCIA_PWR_VPP_VCC; + } else { + printk(KERN_ERR "%s(): bad Vpp %u\n", + __func__, state->Vpp); + ret = -1; + } + } + + if (state->flags & SS_RESET) + power |= MST_PCMCIA_RESET; + + switch (skt->nr) { + case 0: MST_PCMCIA0 = power; break; + case 1: MST_PCMCIA1 = power; break; + default: ret = -1; + } + + return ret; +} + +static struct pcmcia_low_level mst_pcmcia_ops __initdata = { + .owner = THIS_MODULE, + .hw_init = mst_pcmcia_hw_init, + .socket_state = mst_pcmcia_socket_state, + .configure_socket = mst_pcmcia_configure_socket, + .nr = 2, +}; + +static struct platform_device *mst_pcmcia_device; + +static int __init mst_pcmcia_init(void) +{ + int ret; + + if (!machine_is_mainstone()) + return -ENODEV; + + mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!mst_pcmcia_device) + return -ENOMEM; + + ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops, + sizeof(mst_pcmcia_ops)); + if (ret == 0) + ret = platform_device_add(mst_pcmcia_device); + + if (ret) + platform_device_put(mst_pcmcia_device); + + return ret; +} + +static void __exit mst_pcmcia_exit(void) +{ + platform_device_unregister(mst_pcmcia_device); +} + +fs_initcall(mst_pcmcia_init); +module_exit(mst_pcmcia_exit); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa2xx-pcmcia"); |