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182 lines
4.1 KiB
182 lines
4.1 KiB
/* |
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* Viper/Zeus PCMCIA support |
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* Copyright 2004 Arcom Control Systems |
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* |
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* Maintained by Marc Zyngier <[email protected]> |
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* |
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* Based on: |
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* iPAQ h2200 PCMCIA support |
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* Copyright 2004 Koen Kooi <[email protected]> |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive for |
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* more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/gpio.h> |
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#include <pcmcia/ss.h> |
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#include <asm/irq.h> |
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#include <linux/platform_data/pcmcia-pxa2xx_viper.h> |
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#include "soc_common.h" |
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#include "pxa2xx_base.h" |
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static struct platform_device *arcom_pcmcia_dev; |
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static inline struct arcom_pcmcia_pdata *viper_get_pdata(void) |
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{ |
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return arcom_pcmcia_dev->dev.platform_data; |
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} |
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static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); |
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unsigned long flags; |
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skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio; |
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skt->stat[SOC_STAT_CD].name = "PCMCIA_CD"; |
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skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio; |
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skt->stat[SOC_STAT_RDY].name = "CF ready"; |
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if (gpio_request(pdata->pwr_gpio, "CF power")) |
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goto err_request_pwr; |
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local_irq_save(flags); |
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if (gpio_direction_output(pdata->pwr_gpio, 0)) { |
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local_irq_restore(flags); |
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goto err_dir; |
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} |
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local_irq_restore(flags); |
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return 0; |
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err_dir: |
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gpio_free(pdata->pwr_gpio); |
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err_request_pwr: |
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dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n"); |
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return -1; |
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} |
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/* |
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* Release all resources. |
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*/ |
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static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
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{ |
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struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); |
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gpio_free(pdata->pwr_gpio); |
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} |
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static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
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struct pcmcia_state *state) |
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{ |
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state->vs_3v = 1; /* Can only apply 3.3V */ |
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state->vs_Xv = 0; |
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} |
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static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
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const socket_state_t *state) |
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{ |
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struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); |
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/* Silently ignore Vpp, output enable, speaker enable. */ |
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pdata->reset(state->flags & SS_RESET); |
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/* Apply socket voltage */ |
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switch (state->Vcc) { |
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case 0: |
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gpio_set_value(pdata->pwr_gpio, 0); |
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break; |
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case 33: |
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gpio_set_value(pdata->pwr_gpio, 1); |
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break; |
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default: |
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dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc); |
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return -1; |
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} |
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return 0; |
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} |
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static struct pcmcia_low_level viper_pcmcia_ops = { |
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.owner = THIS_MODULE, |
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.hw_init = viper_pcmcia_hw_init, |
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.hw_shutdown = viper_pcmcia_hw_shutdown, |
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.socket_state = viper_pcmcia_socket_state, |
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.configure_socket = viper_pcmcia_configure_socket, |
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.nr = 1, |
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}; |
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static struct platform_device *viper_pcmcia_device; |
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static int viper_pcmcia_probe(struct platform_device *pdev) |
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{ |
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int ret; |
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/* I can't imagine more than one device, but you never know... */ |
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if (arcom_pcmcia_dev) |
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return -EEXIST; |
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if (!pdev->dev.platform_data) |
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return -EINVAL; |
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viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
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if (!viper_pcmcia_device) |
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return -ENOMEM; |
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arcom_pcmcia_dev = pdev; |
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viper_pcmcia_device->dev.parent = &pdev->dev; |
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ret = platform_device_add_data(viper_pcmcia_device, |
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&viper_pcmcia_ops, |
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sizeof(viper_pcmcia_ops)); |
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if (!ret) |
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ret = platform_device_add(viper_pcmcia_device); |
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if (ret) { |
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platform_device_put(viper_pcmcia_device); |
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arcom_pcmcia_dev = NULL; |
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} |
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return ret; |
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} |
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static int viper_pcmcia_remove(struct platform_device *pdev) |
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{ |
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platform_device_unregister(viper_pcmcia_device); |
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arcom_pcmcia_dev = NULL; |
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return 0; |
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} |
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static struct platform_device_id viper_pcmcia_id_table[] = { |
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{ .name = "viper-pcmcia", }, |
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{ .name = "zeus-pcmcia", }, |
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{ }, |
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}; |
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static struct platform_driver viper_pcmcia_driver = { |
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.probe = viper_pcmcia_probe, |
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.remove = viper_pcmcia_remove, |
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.driver = { |
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.name = "arcom-pcmcia", |
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}, |
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.id_table = viper_pcmcia_id_table, |
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}; |
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module_platform_driver(viper_pcmcia_driver); |
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MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table); |
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MODULE_LICENSE("GPL");
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