diff options
Diffstat (limited to 'drivers/pcmcia/sa1111_generic.c')
| -rw-r--r-- | drivers/pcmcia/sa1111_generic.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1111_generic.c b/drivers/pcmcia/sa1111_generic.c new file mode 100644 index 000000000..117834102 --- /dev/null +++ b/drivers/pcmcia/sa1111_generic.c @@ -0,0 +1,281 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/pcmcia/sa1111_generic.c + * + * We implement the generic parts of a SA1111 PCMCIA driver. This + * basically means we handle everything except controlling the + * power. Power is machine specific... + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/slab.h> + +#include <pcmcia/ss.h> + +#include <mach/hardware.h> +#include <asm/hardware/sa1111.h> +#include <asm/mach-types.h> +#include <asm/irq.h> + +#include "sa1111_generic.h" + +/* + * These are offsets from the above base. + */ +#define PCCR 0x0000 +#define PCSSR 0x0004 +#define PCSR 0x0008 + +#define PCSR_S0_READY (1<<0) +#define PCSR_S1_READY (1<<1) +#define PCSR_S0_DETECT (1<<2) +#define PCSR_S1_DETECT (1<<3) +#define PCSR_S0_VS1 (1<<4) +#define PCSR_S0_VS2 (1<<5) +#define PCSR_S1_VS1 (1<<6) +#define PCSR_S1_VS2 (1<<7) +#define PCSR_S0_WP (1<<8) +#define PCSR_S1_WP (1<<9) +#define PCSR_S0_BVD1 (1<<10) +#define PCSR_S0_BVD2 (1<<11) +#define PCSR_S1_BVD1 (1<<12) +#define PCSR_S1_BVD2 (1<<13) + +#define PCCR_S0_RST (1<<0) +#define PCCR_S1_RST (1<<1) +#define PCCR_S0_FLT (1<<2) +#define PCCR_S1_FLT (1<<3) +#define PCCR_S0_PWAITEN (1<<4) +#define PCCR_S1_PWAITEN (1<<5) +#define PCCR_S0_PSE (1<<6) +#define PCCR_S1_PSE (1<<7) + +#define PCSSR_S0_SLEEP (1<<0) +#define PCSSR_S1_SLEEP (1<<1) + +#define IDX_IRQ_S0_READY_NINT (0) +#define IDX_IRQ_S0_CD_VALID (1) +#define IDX_IRQ_S0_BVD1_STSCHG (2) +#define IDX_IRQ_S1_READY_NINT (3) +#define IDX_IRQ_S1_CD_VALID (4) +#define IDX_IRQ_S1_BVD1_STSCHG (5) +#define NUM_IRQS (6) + +void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) +{ + struct sa1111_pcmcia_socket *s = to_skt(skt); + u32 status = readl_relaxed(s->dev->mapbase + PCSR); + + switch (skt->nr) { + case 0: + state->detect = status & PCSR_S0_DETECT ? 0 : 1; + state->ready = status & PCSR_S0_READY ? 1 : 0; + state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0; + state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0; + state->wrprot = status & PCSR_S0_WP ? 1 : 0; + state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1; + state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1; + break; + + case 1: + state->detect = status & PCSR_S1_DETECT ? 0 : 1; + state->ready = status & PCSR_S1_READY ? 1 : 0; + state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0; + state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0; + state->wrprot = status & PCSR_S1_WP ? 1 : 0; + state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1; + state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1; + break; + } +} + +int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) +{ + struct sa1111_pcmcia_socket *s = to_skt(skt); + u32 pccr_skt_mask, pccr_set_mask, val; + unsigned long flags; + + switch (skt->nr) { + case 0: + pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE; + break; + + case 1: + pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE; + break; + + default: + return -1; + } + + pccr_set_mask = 0; + + if (state->Vcc != 0) + pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN; + if (state->Vcc == 50) + pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE; + if (state->flags & SS_RESET) + pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST; + if (state->flags & SS_OUTPUT_ENA) + pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT; + + local_irq_save(flags); + val = readl_relaxed(s->dev->mapbase + PCCR); + val &= ~pccr_skt_mask; + val |= pccr_set_mask & pccr_skt_mask; + writel_relaxed(val, s->dev->mapbase + PCCR); + local_irq_restore(flags); + + return 0; +} + +int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops, + int (*add)(struct soc_pcmcia_socket *)) +{ + struct sa1111_pcmcia_socket *s; + struct clk *clk; + int i, ret = 0, irqs[NUM_IRQS]; + + clk = devm_clk_get(&dev->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + for (i = 0; i < NUM_IRQS; i++) { + irqs[i] = sa1111_get_irq(dev, i); + if (irqs[i] <= 0) + return irqs[i] ? : -ENXIO; + } + + ops->socket_state = sa1111_pcmcia_socket_state; + + for (i = 0; i < ops->nr; i++) { + s = kzalloc(sizeof(*s), GFP_KERNEL); + if (!s) + return -ENOMEM; + + s->soc.nr = ops->first + i; + s->soc.clk = clk; + + soc_pcmcia_init_one(&s->soc, ops, &dev->dev); + s->dev = dev; + if (s->soc.nr) { + s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT]; + s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID]; + s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect"; + s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG]; + s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1"; + } else { + s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT]; + s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID]; + s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect"; + s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG]; + s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1"; + } + + ret = add(&s->soc); + if (ret == 0) { + s->next = dev_get_drvdata(&dev->dev); + dev_set_drvdata(&dev->dev, s); + } else + kfree(s); + } + + return ret; +} + +static int pcmcia_probe(struct sa1111_dev *dev) +{ + void __iomem *base; + int ret; + + ret = sa1111_enable_device(dev); + if (ret) + return ret; + + dev_set_drvdata(&dev->dev, NULL); + + if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) { + sa1111_disable_device(dev); + return -EBUSY; + } + + base = dev->mapbase; + + /* + * Initialise the suspend state. + */ + writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR); + writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR); + + ret = -ENODEV; +#ifdef CONFIG_SA1100_BADGE4 + if (machine_is_badge4()) + ret = pcmcia_badge4_init(dev); +#endif +#ifdef CONFIG_SA1100_JORNADA720 + if (machine_is_jornada720()) + ret = pcmcia_jornada720_init(dev); +#endif +#ifdef CONFIG_ARCH_LUBBOCK + if (machine_is_lubbock()) + ret = pcmcia_lubbock_init(dev); +#endif +#ifdef CONFIG_ASSABET_NEPONSET + if (machine_is_assabet()) + ret = pcmcia_neponset_init(dev); +#endif + + if (ret) { + release_mem_region(dev->res.start, 512); + sa1111_disable_device(dev); + } + + return ret; +} + +static int pcmcia_remove(struct sa1111_dev *dev) +{ + struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev); + + dev_set_drvdata(&dev->dev, NULL); + + for (; s; s = next) { + next = s->next; + soc_pcmcia_remove_one(&s->soc); + kfree(s); + } + + release_mem_region(dev->res.start, 512); + sa1111_disable_device(dev); + return 0; +} + +static struct sa1111_driver pcmcia_driver = { + .drv = { + .name = "sa1111-pcmcia", + }, + .devid = SA1111_DEVID_PCMCIA, + .probe = pcmcia_probe, + .remove = pcmcia_remove, +}; + +static int __init sa1111_drv_pcmcia_init(void) +{ + return sa1111_driver_register(&pcmcia_driver); +} + +static void __exit sa1111_drv_pcmcia_exit(void) +{ + sa1111_driver_unregister(&pcmcia_driver); +} + +fs_initcall(sa1111_drv_pcmcia_init); +module_exit(sa1111_drv_pcmcia_exit); + +MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver"); +MODULE_LICENSE("GPL"); |