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280 lines
6.8 KiB
280 lines
6.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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 void 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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} |
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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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