Index: linux-2.6.21gum/drivers/pcmcia/Makefile =================================================================== --- linux-2.6.21gum.orig/drivers/pcmcia/Makefile +++ linux-2.6.21gum/drivers/pcmcia/Makefile @@ -69,4 +69,4 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD) += sa pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK) += pxa2xx_lubbock.o sa1111_generic.o pxa2xx_cs-$(CONFIG_MACH_MAINSTONE) += pxa2xx_mainstone.o pxa2xx_cs-$(CONFIG_PXA_SHARPSL) += pxa2xx_sharpsl.o - +pxa2xx_cs-$(CONFIG_ARCH_GUMSTIX) += pxa2xx_gumstix.o Index: linux-2.6.21gum/drivers/pcmcia/pxa2xx_gumstix.c =================================================================== --- /dev/null +++ linux-2.6.21gum/drivers/pcmcia/pxa2xx_gumstix.c @@ -0,0 +1,234 @@ +/* + * linux/drivers/pcmcia/pxa2xx_gumstix.c + * + * Gumstix PCMCIA specific routines. Based on Mainstone + * + * Copyright 2004, Craig Hughes <craig@gumstix.com> + * + * 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/device.h> +#include <linux/platform_device.h> + +#include <pcmcia/ss.h> + +#include <asm/hardware.h> +#include <asm/delay.h> +#include <asm/arch/pxa-regs.h> +#include <asm/irq.h> + +#include <asm/arch/gumstix.h> + +#include "soc_common.h" + +static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = { + { 0, GUMSTIX_S0_nCD_IRQ, "CF0 nCD" }, + { 0, GUMSTIX_S0_nSTSCHG_IRQ, "CF0 nSTSCHG" }, +}; + +static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = { + { 1, GUMSTIX_S1_nCD_IRQ, "CF1 nCD" }, + { 1, GUMSTIX_S1_nSTSCHG_IRQ, "CF1 nSTSCHG" }, +}; + +static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + if(skt->nr == 0) + { + pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_0_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nCD_0_MD); + pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_0_MD); + } else { + pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_1_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nCD_1_MD); + pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_1_MD); + } + + pxa_gpio_mode(GPIO_GUMSTIX_nPOE_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPWE_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPIOR_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPIOW_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2_MD); + pxa_gpio_mode(GPIO_GUMSTIX_pSKTSEL_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPREG_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nPWAIT_MD); + pxa_gpio_mode(GPIO_GUMSTIX_nIOIS16_MD); + + skt->irq = (skt->nr == 0) ? GUMSTIX_S0_PRDY_nBSY_IRQ : GUMSTIX_S1_PRDY_nBSY_IRQ; + + return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) : + soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1)); +} + +static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) +{ + if(skt->nr == 0) + { + soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)); + } else { + soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1)); + } +} + +static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + unsigned int cd, prdy_nbsy, nbvd1; + if(skt->nr == 0) + { + cd = GPIO_GUMSTIX_nCD_0; + prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0; + nbvd1 = GPIO_GUMSTIX_nBVD1_0; + } else { + cd = GPIO_GUMSTIX_nCD_1; + prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1; + nbvd1 = GPIO_GUMSTIX_nBVD1_1; + } + state->detect = !(GPLR(cd) & GPIO_bit(cd)); + state->ready = !!(GPLR(prdy_nbsy) & GPIO_bit(prdy_nbsy)); + state->bvd1 = !!(GPLR(nbvd1) & GPIO_bit(nbvd1)); + state->bvd2 = 1; + state->vs_3v = 0; + state->vs_Xv = 0; + state->wrprot = 0; +} + +static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + return 0; +} + +static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ + if(skt->nr) { + soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)); + } else { + soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1)); + } +} + +static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) +{ + if(skt->nr) { + soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)); + } else { + soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1)); + } +} + +static struct pcmcia_low_level gumstix_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = gumstix_pcmcia_hw_init, + .hw_shutdown = gumstix_pcmcia_hw_shutdown, + .socket_state = gumstix_pcmcia_socket_state, + .configure_socket = gumstix_pcmcia_configure_socket, + .socket_init = gumstix_pcmcia_socket_init, + .socket_suspend = gumstix_pcmcia_socket_suspend, + .nr = 2, +}; + +static struct platform_device *gumstix_pcmcia_device; + +inline void __init gumstix_pcmcia_cpld_clk(void) +{ + GPCR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE); + GPSR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE); +} + +inline unsigned char __init gumstix_pcmcia_cpld_read_bits(int bits) +{ + unsigned char result = 0; + unsigned int shift = 0; + while(bits--) + { + result |= !!(GPLR(GPIO_GUMSTIX_nCD_0) & GPIO_bit(GPIO_GUMSTIX_nCD_0)) << shift; + shift ++; + gumstix_pcmcia_cpld_clk(); + } + printk("CPLD responded with: %02x\n",result); + return result; +} + +/* We use the CPLD on the CF-CF card to read a value from a shift register. If we can read that + * magic sequence, then we have 2 CF cards; otherwise we assume just one + * The CPLD will send the value of the shift register on GPIO11 (the CD line for slot 0) + * when RESET is held in reset. We use GPIO48 (nPOE) as a clock signal, + * GPIO52/53 (card enable for both cards) to control read/write to the shift register + */ +static int __init gumstix_count_cards(void) +{ + pxa_gpio_mode(GPIO_GUMSTIX_nPOE | GPIO_OUT); + pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1 | GPIO_OUT); + pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2 | GPIO_OUT); + pxa_gpio_mode(GPIO_GUMSTIX_nCD_0 | GPIO_IN); + pxa_gpio_mode(GPIO_GUMSTIX_CF_RESET | GPIO_OUT); + + // Enter reset + GPSR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET); + + // Setup the shift register + GPSR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1); + GPCR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2); + + // Tick the clock to program the shift register + gumstix_pcmcia_cpld_clk(); + + // Now set shift register into read mode + GPCR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1); + GPSR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2); + + // We can read the bits now -- 0xC2 means "Dual compact flash" + if(gumstix_pcmcia_cpld_read_bits(8) != 0xC2) + { + // We do not have 2 CF slots + gumstix_pcmcia_ops.nr = 1; + } +} + +static int __init gumstix_pcmcia_init(void) +{ + int ret; + + gumstix_count_cards(); + + udelay(50); + GPCR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET); + + gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!gumstix_pcmcia_device) + return -ENOMEM; + + gumstix_pcmcia_device->dev.platform_data = &gumstix_pcmcia_ops; + + ret = platform_device_add(gumstix_pcmcia_device); + if (ret) + platform_device_put(gumstix_pcmcia_device); + + return ret; +} + +static void __exit gumstix_pcmcia_exit(void) +{ + /* + * This call is supposed to free our gumstix_pcmcia_device. + * Unfortunately platform_device don't have a free method, and + * we can't assume it's free of any reference at this point so we + * can't free it either. + */ + platform_device_unregister(gumstix_pcmcia_device); +} + +fs_initcall(gumstix_pcmcia_init); +module_exit(gumstix_pcmcia_exit); + +MODULE_LICENSE("GPL");