mirror of
https://github.com/edk2-porting/linux-next.git
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de0bc0d1b0
- prepend CS3 accessors by simpad_ to indicate they are specific to simpad devices. - use spinlock to protect shadow register. - implement 8 read-only pins. - use readl/writel macros so barriers are used where necessary. - register CS3 as GPIO controller with 24 pins (16 output only and 8 input only). - fix PCMCIA driver to access the read-only pins rather than the shadow register for status bits. Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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* drivers/pcmcia/sa1100_simpad.c
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*
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* PCMCIA implementation routines for simpad
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <mach/simpad.h>
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#include "sa1100_generic.h"
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static struct pcmcia_irqs irqs[] = {
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{ 1, IRQ_GPIO_CF_CD, "CF_CD" },
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};
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static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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skt->socket.pci_irq = IRQ_GPIO_CF_IRQ;
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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/* Disable CF bus: */
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/*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
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simpad_clear_cs3_bit(PCMCIA_RESET);
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}
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static void
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simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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unsigned long levels = GPLR;
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long cs3reg = simpad_get_cs3_ro();
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state->detect=((levels & GPIO_CF_CD)==0)?1:0;
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state->ready=(levels & GPIO_CF_IRQ)?1:0;
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state->bvd1 = 1; /* Might be cs3reg & PCMCIA_BVD1 */
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state->bvd2 = 1; /* Might be cs3reg & PCMCIA_BVD2 */
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state->wrprot=0; /* Not available on Simpad. */
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if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
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(PCMCIA_VS1|PCMCIA_VS2)) {
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state->vs_3v=0;
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state->vs_Xv=0;
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} else {
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state->vs_3v=1;
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state->vs_Xv=0;
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}
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}
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static int
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simpad_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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unsigned long flags;
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local_irq_save(flags);
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/* Murphy: see table of MIC2562a-1 */
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switch (state->Vcc) {
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case 0:
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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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break;
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case 33:
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simpad_clear_cs3_bit(VCC_3V_EN|EN1);
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simpad_set_cs3_bit(VCC_5V_EN|EN0);
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break;
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case 50:
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simpad_clear_cs3_bit(VCC_5V_EN|EN1);
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simpad_set_cs3_bit(VCC_3V_EN|EN0);
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break;
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default:
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printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
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__func__, state->Vcc);
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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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local_irq_restore(flags);
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return -1;
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}
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local_irq_restore(flags);
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return 0;
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}
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static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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simpad_set_cs3_bit(PCMCIA_RESET);
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}
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static struct pcmcia_low_level simpad_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = simpad_pcmcia_hw_init,
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.hw_shutdown = simpad_pcmcia_hw_shutdown,
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.socket_state = simpad_pcmcia_socket_state,
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.configure_socket = simpad_pcmcia_configure_socket,
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.socket_init = simpad_pcmcia_socket_init,
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.socket_suspend = simpad_pcmcia_socket_suspend,
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};
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int __devinit pcmcia_simpad_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_simpad())
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ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
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return ret;
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}
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