diff options
Diffstat (limited to 'drivers/pcmcia/pxa2xx_sharpsl.c')
| -rw-r--r-- | drivers/pcmcia/pxa2xx_sharpsl.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_sharpsl.c b/drivers/pcmcia/pxa2xx_sharpsl.c new file mode 100644 index 000000000..89ebd8c76 --- /dev/null +++ b/drivers/pcmcia/pxa2xx_sharpsl.c @@ -0,0 +1,262 @@ +/* + * Sharp SL-C7xx Series PCMCIA routines + * + * Copyright (c) 2004-2005 Richard Purdie + * + * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c + * + * 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 <asm/mach-types.h> +#include <mach/hardware.h> +#include <asm/irq.h> +#include <asm/hardware/scoop.h> + +#include "soc_common.h" + +#define NO_KEEP_VS 0x0001 +#define SCOOP_DEV platform_scoop_config->devs + +static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) +{ + struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; + + reset_scoop(scoopdev->dev); + + /* Shared power controls need to be handled carefully */ + if (platform_scoop_config->power_ctrl) + platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); + else + write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); + + scoopdev->keep_vs = NO_KEEP_VS; + scoopdev->keep_rd = 0; +} + +static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + if (SCOOP_DEV[skt->nr].cd_irq >= 0) { + skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq; + skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str; + } + + skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; + + return 0; +} + +static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + unsigned short cpr, csr; + struct device *scoop = SCOOP_DEV[skt->nr].dev; + + cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); + + write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); + write_scoop_reg(scoop, SCOOP_ISR, 0x0000); + write_scoop_reg(scoop, SCOOP_IRM, 0x0000); + csr = read_scoop_reg(scoop, SCOOP_CSR); + if (csr & 0x0004) { + /* card eject */ + write_scoop_reg(scoop, SCOOP_CDR, 0x0000); + SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; + } + else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { + /* keep vs1,vs2 */ + write_scoop_reg(scoop, SCOOP_CDR, 0x0000); + csr |= SCOOP_DEV[skt->nr].keep_vs; + } + else if (cpr & 0x0003) { + /* power on */ + write_scoop_reg(scoop, SCOOP_CDR, 0x0000); + SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); + } + else { + /* card detect */ + if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { + write_scoop_reg(scoop, SCOOP_CDR, 0x0000); + } else { + write_scoop_reg(scoop, SCOOP_CDR, 0x0002); + } + } + + state->detect = (csr & 0x0004) ? 0 : 1; + state->ready = (csr & 0x0002) ? 1 : 0; + state->bvd1 = (csr & 0x0010) ? 1 : 0; + state->bvd2 = (csr & 0x0020) ? 1 : 0; + state->wrprot = (csr & 0x0008) ? 1 : 0; + state->vs_3v = (csr & 0x0040) ? 0 : 1; + state->vs_Xv = (csr & 0x0080) ? 0 : 1; + + if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { + printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); + } +} + + +static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + unsigned long flags; + struct device *scoop = SCOOP_DEV[skt->nr].dev; + + unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; + + switch (state->Vcc) { + case 0: break; + case 33: break; + case 50: break; + default: + printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); + return -1; + } + + if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { + printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); + return -1; + } + + local_irq_save(flags); + + nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; + ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; + nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; + nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; + + if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { + ncpr |= (state->Vcc == 33) ? 0x0002 : + (state->Vcc == 50) ? 0x0002 : 0; + } else { + ncpr |= (state->Vcc == 33) ? 0x0001 : + (state->Vcc == 50) ? 0x0002 : 0; + } + nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; + ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; + nccr |= (state->flags&SS_RESET)? 0x0080: 0; + nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| + ((skt->status&SS_READY) ? 0x0002 : 0)| + ((skt->status&SS_BATDEAD)? 0x0010 : 0)| + ((skt->status&SS_BATWARN)? 0x0020 : 0)| + ((skt->status&SS_STSCHG) ? 0x0010 : 0)| + ((skt->status&SS_WRPROT) ? 0x0008 : 0); + + if (!(ncpr & 0x0003)) { + SCOOP_DEV[skt->nr].keep_rd = 0; + } else if (!SCOOP_DEV[skt->nr].keep_rd) { + if (nccr & 0x0080) + SCOOP_DEV[skt->nr].keep_rd = 1; + else + nccr |= 0x0080; + } + + if (mcr != nmcr) + write_scoop_reg(scoop, SCOOP_MCR, nmcr); + if (cpr != ncpr) { + if (platform_scoop_config->power_ctrl) + platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); + else + write_scoop_reg(scoop, SCOOP_CPR, ncpr); + } + if (ccr != nccr) + write_scoop_reg(scoop, SCOOP_CCR, nccr); + if (imr != nimr) + write_scoop_reg(scoop, SCOOP_IMR, nimr); + + local_irq_restore(flags); + + return 0; +} + +static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ + sharpsl_pcmcia_init_reset(skt); + + /* Enable interrupt */ + write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); + write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); + SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; +} + +static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) +{ + sharpsl_pcmcia_init_reset(skt); +} + +static struct pcmcia_low_level sharpsl_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = sharpsl_pcmcia_hw_init, + .socket_state = sharpsl_pcmcia_socket_state, + .configure_socket = sharpsl_pcmcia_configure_socket, + .socket_init = sharpsl_pcmcia_socket_init, + .socket_suspend = sharpsl_pcmcia_socket_suspend, + .first = 0, + .nr = 0, +}; + +#ifdef CONFIG_SA1100_COLLIE +#include "sa11xx_base.h" + +int pcmcia_collie_init(struct device *dev) +{ + int ret = -ENODEV; + + if (machine_is_collie()) + ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); + + return ret; +} + +#else + +static struct platform_device *sharpsl_pcmcia_device; + +static int __init sharpsl_pcmcia_init(void) +{ + int ret; + + if (!platform_scoop_config) + return -ENODEV; + + sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; + sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + + if (!sharpsl_pcmcia_device) + return -ENOMEM; + + ret = platform_device_add_data(sharpsl_pcmcia_device, + &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops)); + if (ret == 0) { + sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; + ret = platform_device_add(sharpsl_pcmcia_device); + } + + if (ret) + platform_device_put(sharpsl_pcmcia_device); + + return ret; +} + +static void __exit sharpsl_pcmcia_exit(void) +{ + platform_device_unregister(sharpsl_pcmcia_device); +} + +fs_initcall(sharpsl_pcmcia_init); +module_exit(sharpsl_pcmcia_exit); +#endif + +MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa2xx-pcmcia"); |