281 lines
6.7 KiB
C
281 lines
6.7 KiB
C
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/*
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* linux/drivers/pcmcia/sa1111_generic.c
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*
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* We implement the generic parts of a SA1111 PCMCIA driver. This
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* basically means we handle everything except controlling the
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* power. Power is machine specific...
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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/ioport.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <pcmcia/ss.h>
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#include <mach/hardware.h>
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#include <asm/hardware/sa1111.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include "sa1111_generic.h"
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/*
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* These are offsets from the above base.
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*/
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#define PCCR 0x0000
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#define PCSSR 0x0004
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#define PCSR 0x0008
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#define PCSR_S0_READY (1<<0)
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#define PCSR_S1_READY (1<<1)
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#define PCSR_S0_DETECT (1<<2)
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#define PCSR_S1_DETECT (1<<3)
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#define PCSR_S0_VS1 (1<<4)
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#define PCSR_S0_VS2 (1<<5)
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#define PCSR_S1_VS1 (1<<6)
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#define PCSR_S1_VS2 (1<<7)
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#define PCSR_S0_WP (1<<8)
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#define PCSR_S1_WP (1<<9)
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#define PCSR_S0_BVD1 (1<<10)
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#define PCSR_S0_BVD2 (1<<11)
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#define PCSR_S1_BVD1 (1<<12)
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#define PCSR_S1_BVD2 (1<<13)
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#define PCCR_S0_RST (1<<0)
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#define PCCR_S1_RST (1<<1)
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#define PCCR_S0_FLT (1<<2)
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#define PCCR_S1_FLT (1<<3)
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#define PCCR_S0_PWAITEN (1<<4)
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#define PCCR_S1_PWAITEN (1<<5)
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#define PCCR_S0_PSE (1<<6)
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#define PCCR_S1_PSE (1<<7)
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#define PCSSR_S0_SLEEP (1<<0)
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#define PCSSR_S1_SLEEP (1<<1)
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#define IDX_IRQ_S0_READY_NINT (0)
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#define IDX_IRQ_S0_CD_VALID (1)
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#define IDX_IRQ_S0_BVD1_STSCHG (2)
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#define IDX_IRQ_S1_READY_NINT (3)
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#define IDX_IRQ_S1_CD_VALID (4)
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#define IDX_IRQ_S1_BVD1_STSCHG (5)
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#define NUM_IRQS (6)
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void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
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{
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struct sa1111_pcmcia_socket *s = to_skt(skt);
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u32 status = readl_relaxed(s->dev->mapbase + PCSR);
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switch (skt->nr) {
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case 0:
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state->detect = status & PCSR_S0_DETECT ? 0 : 1;
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state->ready = status & PCSR_S0_READY ? 1 : 0;
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state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
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state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
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state->wrprot = status & PCSR_S0_WP ? 1 : 0;
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state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
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state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
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break;
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case 1:
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state->detect = status & PCSR_S1_DETECT ? 0 : 1;
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state->ready = status & PCSR_S1_READY ? 1 : 0;
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state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
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state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
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state->wrprot = status & PCSR_S1_WP ? 1 : 0;
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state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
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state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
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break;
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}
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}
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int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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struct sa1111_pcmcia_socket *s = to_skt(skt);
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u32 pccr_skt_mask, pccr_set_mask, val;
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unsigned long flags;
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switch (skt->nr) {
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case 0:
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pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
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break;
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case 1:
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pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
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break;
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default:
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return -1;
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}
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pccr_set_mask = 0;
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if (state->Vcc != 0)
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pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
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if (state->Vcc == 50)
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pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
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if (state->flags & SS_RESET)
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pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
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if (state->flags & SS_OUTPUT_ENA)
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pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
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local_irq_save(flags);
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val = readl_relaxed(s->dev->mapbase + PCCR);
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val &= ~pccr_skt_mask;
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val |= pccr_set_mask & pccr_skt_mask;
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writel_relaxed(val, s->dev->mapbase + PCCR);
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local_irq_restore(flags);
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return 0;
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}
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int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
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int (*add)(struct soc_pcmcia_socket *))
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{
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struct sa1111_pcmcia_socket *s;
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struct clk *clk;
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int i, ret = 0, irqs[NUM_IRQS];
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clk = devm_clk_get(&dev->dev, NULL);
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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for (i = 0; i < NUM_IRQS; i++) {
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irqs[i] = sa1111_get_irq(dev, i);
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if (irqs[i] <= 0)
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return irqs[i] ? : -ENXIO;
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}
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ops->socket_state = sa1111_pcmcia_socket_state;
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for (i = 0; i < ops->nr; i++) {
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s = kzalloc(sizeof(*s), GFP_KERNEL);
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if (!s)
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return -ENOMEM;
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s->soc.nr = ops->first + i;
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s->soc.clk = clk;
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soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
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s->dev = dev;
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if (s->soc.nr) {
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s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
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s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
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s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
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s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
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s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
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} else {
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s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
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s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
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s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
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s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
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s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
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}
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ret = add(&s->soc);
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if (ret == 0) {
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s->next = dev_get_drvdata(&dev->dev);
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dev_set_drvdata(&dev->dev, s);
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} else
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kfree(s);
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}
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return ret;
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}
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static int pcmcia_probe(struct sa1111_dev *dev)
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{
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void __iomem *base;
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int ret;
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ret = sa1111_enable_device(dev);
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if (ret)
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return ret;
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dev_set_drvdata(&dev->dev, NULL);
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if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
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sa1111_disable_device(dev);
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return -EBUSY;
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}
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base = dev->mapbase;
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/*
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* Initialise the suspend state.
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*/
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writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
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writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
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ret = -ENODEV;
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#ifdef CONFIG_SA1100_BADGE4
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if (machine_is_badge4())
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ret = pcmcia_badge4_init(dev);
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#endif
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#ifdef CONFIG_SA1100_JORNADA720
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if (machine_is_jornada720())
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ret = pcmcia_jornada720_init(dev);
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#endif
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#ifdef CONFIG_ARCH_LUBBOCK
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if (machine_is_lubbock())
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ret = pcmcia_lubbock_init(dev);
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#endif
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#ifdef CONFIG_ASSABET_NEPONSET
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if (machine_is_assabet())
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ret = pcmcia_neponset_init(dev);
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#endif
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if (ret) {
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release_mem_region(dev->res.start, 512);
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sa1111_disable_device(dev);
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}
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return ret;
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}
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static int pcmcia_remove(struct sa1111_dev *dev)
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{
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struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
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dev_set_drvdata(&dev->dev, NULL);
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for (; s; s = next) {
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next = s->next;
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soc_pcmcia_remove_one(&s->soc);
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kfree(s);
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}
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release_mem_region(dev->res.start, 512);
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sa1111_disable_device(dev);
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return 0;
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}
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static struct sa1111_driver pcmcia_driver = {
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.drv = {
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.name = "sa1111-pcmcia",
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},
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.devid = SA1111_DEVID_PCMCIA,
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.probe = pcmcia_probe,
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.remove = pcmcia_remove,
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};
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static int __init sa1111_drv_pcmcia_init(void)
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{
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return sa1111_driver_register(&pcmcia_driver);
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}
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static void __exit sa1111_drv_pcmcia_exit(void)
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{
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sa1111_driver_unregister(&pcmcia_driver);
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}
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fs_initcall(sa1111_drv_pcmcia_init);
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module_exit(sa1111_drv_pcmcia_exit);
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MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
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MODULE_LICENSE("GPL");
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