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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-sa1100/neponset.c
downloadconfigs-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/mach-sa1100/neponset.c')
-rw-r--r--arch/arm/mach-sa1100/neponset.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c
new file mode 100644
index 00000000000..1405383463e
--- /dev/null
+++ b/arch/arm/mach-sa1100/neponset.c
@@ -0,0 +1,342 @@
+/*
+ * linux/arch/arm/mach-sa1100/neponset.c
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/tty.h>
+#include <linux/ioport.h>
+#include <linux/serial_core.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/serial_sa1100.h>
+#include <asm/arch/assabet.h>
+#include <asm/arch/neponset.h>
+#include <asm/hardware/sa1111.h>
+#include <asm/sizes.h>
+
+/*
+ * Install handler for Neponset IRQ. Note that we have to loop here
+ * since the ETHERNET and USAR IRQs are level based, and we need to
+ * ensure that the IRQ signal is deasserted before returning. This
+ * is rather unfortunate.
+ */
+static void
+neponset_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ unsigned int irr;
+
+ while (1) {
+ struct irqdesc *d;
+
+ /*
+ * Acknowledge the parent IRQ.
+ */
+ desc->chip->ack(irq);
+
+ /*
+ * Read the interrupt reason register. Let's have all
+ * active IRQ bits high. Note: there is a typo in the
+ * Neponset user's guide for the SA1111 IRR level.
+ */
+ irr = IRR ^ (IRR_ETHERNET | IRR_USAR);
+
+ if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
+ break;
+
+ /*
+ * Since there is no individual mask, we have to
+ * mask the parent IRQ. This is safe, since we'll
+ * recheck the register for any pending IRQs.
+ */
+ if (irr & (IRR_ETHERNET | IRR_USAR)) {
+ desc->chip->mask(irq);
+
+ if (irr & IRR_ETHERNET) {
+ d = irq_desc + IRQ_NEPONSET_SMC9196;
+ d->handle(IRQ_NEPONSET_SMC9196, d, regs);
+ }
+
+ if (irr & IRR_USAR) {
+ d = irq_desc + IRQ_NEPONSET_USAR;
+ d->handle(IRQ_NEPONSET_USAR, d, regs);
+ }
+
+ desc->chip->unmask(irq);
+ }
+
+ if (irr & IRR_SA1111) {
+ d = irq_desc + IRQ_NEPONSET_SA1111;
+ d->handle(IRQ_NEPONSET_SA1111, d, regs);
+ }
+ }
+}
+
+static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
+{
+ u_int mdm_ctl0 = MDM_CTL_0;
+
+ if (port->mapbase == _Ser1UTCR0) {
+ if (mctrl & TIOCM_RTS)
+ mdm_ctl0 &= ~MDM_CTL0_RTS2;
+ else
+ mdm_ctl0 |= MDM_CTL0_RTS2;
+
+ if (mctrl & TIOCM_DTR)
+ mdm_ctl0 &= ~MDM_CTL0_DTR2;
+ else
+ mdm_ctl0 |= MDM_CTL0_DTR2;
+ } else if (port->mapbase == _Ser3UTCR0) {
+ if (mctrl & TIOCM_RTS)
+ mdm_ctl0 &= ~MDM_CTL0_RTS1;
+ else
+ mdm_ctl0 |= MDM_CTL0_RTS1;
+
+ if (mctrl & TIOCM_DTR)
+ mdm_ctl0 &= ~MDM_CTL0_DTR1;
+ else
+ mdm_ctl0 |= MDM_CTL0_DTR1;
+ }
+
+ MDM_CTL_0 = mdm_ctl0;
+}
+
+static u_int neponset_get_mctrl(struct uart_port *port)
+{
+ u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
+ u_int mdm_ctl1 = MDM_CTL_1;
+
+ if (port->mapbase == _Ser1UTCR0) {
+ if (mdm_ctl1 & MDM_CTL1_DCD2)
+ ret &= ~TIOCM_CD;
+ if (mdm_ctl1 & MDM_CTL1_CTS2)
+ ret &= ~TIOCM_CTS;
+ if (mdm_ctl1 & MDM_CTL1_DSR2)
+ ret &= ~TIOCM_DSR;
+ } else if (port->mapbase == _Ser3UTCR0) {
+ if (mdm_ctl1 & MDM_CTL1_DCD1)
+ ret &= ~TIOCM_CD;
+ if (mdm_ctl1 & MDM_CTL1_CTS1)
+ ret &= ~TIOCM_CTS;
+ if (mdm_ctl1 & MDM_CTL1_DSR1)
+ ret &= ~TIOCM_DSR;
+ }
+
+ return ret;
+}
+
+static struct sa1100_port_fns neponset_port_fns __initdata = {
+ .set_mctrl = neponset_set_mctrl,
+ .get_mctrl = neponset_get_mctrl,
+};
+
+static int neponset_probe(struct device *dev)
+{
+ sa1100_register_uart_fns(&neponset_port_fns);
+
+ /*
+ * Install handler for GPIO25.
+ */
+ set_irq_type(IRQ_GPIO25, IRQT_RISING);
+ set_irq_chained_handler(IRQ_GPIO25, neponset_irq_handler);
+
+ /*
+ * We would set IRQ_GPIO25 to be a wake-up IRQ, but
+ * unfortunately something on the Neponset activates
+ * this IRQ on sleep (ethernet?)
+ */
+#if 0
+ enable_irq_wake(IRQ_GPIO25);
+#endif
+
+ /*
+ * Setup other Neponset IRQs. SA1111 will be done by the
+ * generic SA1111 code.
+ */
+ set_irq_handler(IRQ_NEPONSET_SMC9196, do_simple_IRQ);
+ set_irq_flags(IRQ_NEPONSET_SMC9196, IRQF_VALID | IRQF_PROBE);
+ set_irq_handler(IRQ_NEPONSET_USAR, do_simple_IRQ);
+ set_irq_flags(IRQ_NEPONSET_USAR, IRQF_VALID | IRQF_PROBE);
+
+ /*
+ * Disable GPIO 0/1 drivers so the buttons work on the module.
+ */
+ NCR_0 = NCR_GP01_OFF;
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+/*
+ * LDM power management.
+ */
+static int neponset_suspend(struct device *dev, pm_message_t state, u32 level)
+{
+ /*
+ * Save state.
+ */
+ if (level == SUSPEND_SAVE_STATE ||
+ level == SUSPEND_DISABLE ||
+ level == SUSPEND_POWER_DOWN) {
+ if (!dev->power.saved_state)
+ dev->power.saved_state = kmalloc(sizeof(unsigned int), GFP_KERNEL);
+ if (!dev->power.saved_state)
+ return -ENOMEM;
+
+ *(unsigned int *)dev->power.saved_state = NCR_0;
+ }
+
+ return 0;
+}
+
+static int neponset_resume(struct device *dev, u32 level)
+{
+ if (level == RESUME_RESTORE_STATE || level == RESUME_ENABLE) {
+ if (dev->power.saved_state) {
+ NCR_0 = *(unsigned int *)dev->power.saved_state;
+ kfree(dev->power.saved_state);
+ dev->power.saved_state = NULL;
+ }
+ }
+
+ return 0;
+}
+
+#else
+#define neponset_suspend NULL
+#define neponset_resume NULL
+#endif
+
+static struct device_driver neponset_device_driver = {
+ .name = "neponset",
+ .bus = &platform_bus_type,
+ .probe = neponset_probe,
+ .suspend = neponset_suspend,
+ .resume = neponset_resume,
+};
+
+static struct resource neponset_resources[] = {
+ [0] = {
+ .start = 0x10000000,
+ .end = 0x17ffffff,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device neponset_device = {
+ .name = "neponset",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(neponset_resources),
+ .resource = neponset_resources,
+};
+
+static struct resource sa1111_resources[] = {
+ [0] = {
+ .start = 0x40000000,
+ .end = 0x40001fff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_NEPONSET_SA1111,
+ .end = IRQ_NEPONSET_SA1111,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static u64 sa1111_dmamask = 0xffffffffUL;
+
+static struct platform_device sa1111_device = {
+ .name = "sa1111",
+ .id = 0,
+ .dev = {
+ .dma_mask = &sa1111_dmamask,
+ .coherent_dma_mask = 0xffffffff,
+ },
+ .num_resources = ARRAY_SIZE(sa1111_resources),
+ .resource = sa1111_resources,
+};
+
+static struct resource smc91x_resources[] = {
+ [0] = {
+ .name = "smc91x-regs",
+ .start = SA1100_CS3_PHYS,
+ .end = SA1100_CS3_PHYS + 0x01ffffff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_NEPONSET_SMC9196,
+ .end = IRQ_NEPONSET_SMC9196,
+ .flags = IORESOURCE_IRQ,
+ },
+ [2] = {
+ .name = "smc91x-attrib",
+ .start = SA1100_CS3_PHYS + 0x02000000,
+ .end = SA1100_CS3_PHYS + 0x03ffffff,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device smc91x_device = {
+ .name = "smc91x",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(smc91x_resources),
+ .resource = smc91x_resources,
+};
+
+static struct platform_device *devices[] __initdata = {
+ &neponset_device,
+ &sa1111_device,
+ &smc91x_device,
+};
+
+static int __init neponset_init(void)
+{
+ driver_register(&neponset_device_driver);
+
+ /*
+ * The Neponset is only present on the Assabet machine type.
+ */
+ if (!machine_is_assabet())
+ return -ENODEV;
+
+ /*
+ * Ensure that the memory bus request/grant signals are setup,
+ * and the grant is held in its inactive state, whether or not
+ * we actually have a Neponset attached.
+ */
+ sa1110_mb_disable();
+
+ if (!machine_has_neponset()) {
+ printk(KERN_DEBUG "Neponset expansion board not present\n");
+ return -ENODEV;
+ }
+
+ if (WHOAMI != 0x11) {
+ printk(KERN_WARNING "Neponset board detected, but "
+ "wrong ID: %02x\n", WHOAMI);
+ return -ENODEV;
+ }
+
+ return platform_add_devices(devices, ARRAY_SIZE(devices));
+}
+
+subsys_initcall(neponset_init);
+
+static struct map_desc neponset_io_desc[] __initdata = {
+ /* virtual physical length type */
+ { 0xf3000000, 0x10000000, SZ_1M, MT_DEVICE }, /* System Registers */
+ { 0xf4000000, 0x40000000, SZ_1M, MT_DEVICE } /* SA-1111 */
+};
+
+void __init neponset_map_io(void)
+{
+ iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
+}