diff options
Diffstat (limited to 'arch/arm/mach-pxa/trizeps4-pcmcia.c')
| -rw-r--r-- | arch/arm/mach-pxa/trizeps4-pcmcia.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/trizeps4-pcmcia.c b/arch/arm/mach-pxa/trizeps4-pcmcia.c new file mode 100644 index 000000000000..25e363770565 --- /dev/null +++ b/arch/arm/mach-pxa/trizeps4-pcmcia.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/pcmcia/pxa2xx_trizeps4.c + * + * TRIZEPS PCMCIA specific routines. + * + * Author: Jürgen Schindele + * Created: 20 02, 2006 + * Copyright: Jürgen Schindele + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> + +#include <asm/mach-types.h> +#include <asm/irq.h> + +#include "pxa2xx-regs.h" +#include "trizeps4.h" + +#include <pcmcia/soc_common.h> + +extern void board_pcmcia_power(int power); + +static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + /* we dont have voltage/card/ready detection + * so we dont need interrupts for it + */ + switch (skt->nr) { + case 0: + skt->stat[SOC_STAT_CD].gpio = GPIO_PCD; + skt->stat[SOC_STAT_CD].name = "cs0_cd"; + skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY; + skt->stat[SOC_STAT_RDY].name = "cs0_rdy"; + break; + default: + break; + } + /* release the reset of this card */ + pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq); + + return 0; +} + +static unsigned long trizeps_pcmcia_status[2]; + +static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + unsigned short status = 0, change; + status = CFSR_readw(); + change = (status ^ trizeps_pcmcia_status[skt->nr]) & + ConXS_CFSR_BVD_MASK; + if (change) { + trizeps_pcmcia_status[skt->nr] = status; + if (status & ConXS_CFSR_BVD1) { + /* enable_irq empty */ + } else { + /* disable_irq empty */ + } + } + + switch (skt->nr) { + case 0: + /* just fill in fix states */ + state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0; + state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0; + state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1; + state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1; + break; + +#ifndef CONFIG_MACH_TRIZEPS_CONXS + /* on ConXS we only have one slot. Second is inactive */ + case 1: + state->detect = 0; + state->ready = 0; + state->bvd1 = 0; + state->bvd2 = 0; + state->vs_3v = 0; + state->vs_Xv = 0; + break; + +#endif + } +} + +static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + int ret = 0; + unsigned short power = 0; + + /* we do nothing here just check a bit */ + switch (state->Vcc) { + case 0: power &= 0xfc; break; + case 33: power |= ConXS_BCR_S0_VCC_3V3; break; + case 50: + pr_err("%s(): Vcc 5V not supported in socket\n", __func__); + break; + default: + pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc); + ret = -1; + } + + switch (state->Vpp) { + case 0: power &= 0xf3; break; + case 33: power |= ConXS_BCR_S0_VPP_3V3; break; + case 120: + pr_err("%s(): Vpp 12V not supported in socket\n", __func__); + break; + default: + if (state->Vpp != state->Vcc) { + pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp); + ret = -1; + } + } + + switch (skt->nr) { + case 0: /* we only have 3.3V */ + board_pcmcia_power(power); + break; + +#ifndef CONFIG_MACH_TRIZEPS_CONXS + /* on ConXS we only have one slot. Second is inactive */ + case 1: +#endif + default: + break; + } + + return ret; +} + +static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ + /* default is on */ + board_pcmcia_power(0x9); +} + +static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) +{ + board_pcmcia_power(0x0); +} + +static struct pcmcia_low_level trizeps_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = trizeps_pcmcia_hw_init, + .socket_state = trizeps_pcmcia_socket_state, + .configure_socket = trizeps_pcmcia_configure_socket, + .socket_init = trizeps_pcmcia_socket_init, + .socket_suspend = trizeps_pcmcia_socket_suspend, +#ifdef CONFIG_MACH_TRIZEPS_CONXS + .nr = 1, +#else + .nr = 2, +#endif + .first = 0, +}; + +static struct platform_device *trizeps_pcmcia_device; + +static int __init trizeps_pcmcia_init(void) +{ + int ret; + + if (!machine_is_trizeps4() && !machine_is_trizeps4wl()) + return -ENODEV; + + trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!trizeps_pcmcia_device) + return -ENOMEM; + + ret = platform_device_add_data(trizeps_pcmcia_device, + &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops)); + + if (ret == 0) + ret = platform_device_add(trizeps_pcmcia_device); + + if (ret) + platform_device_put(trizeps_pcmcia_device); + + return ret; +} + +static void __exit trizeps_pcmcia_exit(void) +{ + platform_device_unregister(trizeps_pcmcia_device); +} + +fs_initcall(trizeps_pcmcia_init); +module_exit(trizeps_pcmcia_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juergen Schindele"); +MODULE_ALIAS("platform:pxa2xx-pcmcia"); |