diff options
Diffstat (limited to 'arch/arm/mach-ux500/modem-irq-db5500.c')
| -rw-r--r-- | arch/arm/mach-ux500/modem-irq-db5500.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/arch/arm/mach-ux500/modem-irq-db5500.c b/arch/arm/mach-ux500/modem-irq-db5500.c deleted file mode 100644 index 6b86416c94c9..000000000000 --- a/arch/arm/mach-ux500/modem-irq-db5500.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * Author: Stefan Nilsson <stefan.xk.nilsson@stericsson.com> for ST-Ericsson. - * Author: Martin Persson <martin.persson@stericsson.com> for ST-Ericsson. - * License terms: GNU General Public License (GPL), version 2. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/slab.h> - -#include <mach/id.h> - -#define MODEM_INTCON_BASE_ADDR 0xBFFD3000 -#define MODEM_INTCON_SIZE 0xFFF - -#define DEST_IRQ41_OFFSET 0x2A4 -#define DEST_IRQ43_OFFSET 0x2AC -#define DEST_IRQ45_OFFSET 0x2B4 - -#define PRIO_IRQ41_OFFSET 0x6A4 -#define PRIO_IRQ43_OFFSET 0x6AC -#define PRIO_IRQ45_OFFSET 0x6B4 - -#define ALLOW_IRQ_OFFSET 0x104 - -#define MODEM_INTCON_CPU_NBR 0x1 -#define MODEM_INTCON_PRIO_HIGH 0x0 - -#define MODEM_INTCON_ALLOW_IRQ41 0x0200 -#define MODEM_INTCON_ALLOW_IRQ43 0x0800 -#define MODEM_INTCON_ALLOW_IRQ45 0x2000 - -#define MODEM_IRQ_REG_OFFSET 0x4 - -struct modem_irq { - void __iomem *modem_intcon_base; -}; - - -static void setup_modem_intcon(void __iomem *modem_intcon_base) -{ - /* IC_DESTINATION_BASE_ARRAY - Which CPU to receive the IRQ */ - writel(MODEM_INTCON_CPU_NBR, modem_intcon_base + DEST_IRQ41_OFFSET); - writel(MODEM_INTCON_CPU_NBR, modem_intcon_base + DEST_IRQ43_OFFSET); - writel(MODEM_INTCON_CPU_NBR, modem_intcon_base + DEST_IRQ45_OFFSET); - - /* IC_PRIORITY_BASE_ARRAY - IRQ priority in modem IRQ controller */ - writel(MODEM_INTCON_PRIO_HIGH, modem_intcon_base + PRIO_IRQ41_OFFSET); - writel(MODEM_INTCON_PRIO_HIGH, modem_intcon_base + PRIO_IRQ43_OFFSET); - writel(MODEM_INTCON_PRIO_HIGH, modem_intcon_base + PRIO_IRQ45_OFFSET); - - /* IC_ALLOW_ARRAY - IRQ enable */ - writel(MODEM_INTCON_ALLOW_IRQ41 | - MODEM_INTCON_ALLOW_IRQ43 | - MODEM_INTCON_ALLOW_IRQ45, - modem_intcon_base + ALLOW_IRQ_OFFSET); -} - -static irqreturn_t modem_cpu_irq_handler(int irq, void *data) -{ - int real_irq; - int virt_irq; - struct modem_irq *mi = (struct modem_irq *)data; - - /* Read modem side IRQ number from modem IRQ controller */ - real_irq = readl(mi->modem_intcon_base + MODEM_IRQ_REG_OFFSET) & 0xFF; - virt_irq = IRQ_MODEM_EVENTS_BASE + real_irq; - - pr_debug("modem_irq: Worker read addr 0x%X and got value 0x%X " - "which will be 0x%X (%d) which translates to " - "virtual IRQ 0x%X (%d)!\n", - (u32)mi->modem_intcon_base + MODEM_IRQ_REG_OFFSET, - real_irq, - real_irq & 0xFF, - real_irq & 0xFF, - virt_irq, - virt_irq); - - if (virt_irq != 0) - generic_handle_irq(virt_irq); - - pr_debug("modem_irq: Done handling virtual IRQ %d!\n", virt_irq); - - return IRQ_HANDLED; -} - -static void create_virtual_irq(int irq, struct irq_chip *modem_irq_chip) -{ - irq_set_chip_and_handler(irq, modem_irq_chip, handle_simple_irq); - set_irq_flags(irq, IRQF_VALID); - - pr_debug("modem_irq: Created virtual IRQ %d\n", irq); -} - -static int modem_irq_init(void) -{ - int err; - static struct irq_chip modem_irq_chip; - struct modem_irq *mi; - - if (!cpu_is_u5500()) - return -ENODEV; - - pr_info("modem_irq: Set up IRQ handler for incoming modem IRQ %d\n", - IRQ_DB5500_MODEM); - - mi = kmalloc(sizeof(struct modem_irq), GFP_KERNEL); - if (!mi) { - pr_err("modem_irq: Could not allocate device\n"); - return -ENOMEM; - } - - mi->modem_intcon_base = - ioremap(MODEM_INTCON_BASE_ADDR, MODEM_INTCON_SIZE); - pr_debug("modem_irq: ioremapped modem_intcon_base from " - "phy 0x%x to virt 0x%x\n", MODEM_INTCON_BASE_ADDR, - (u32)mi->modem_intcon_base); - - setup_modem_intcon(mi->modem_intcon_base); - - modem_irq_chip = dummy_irq_chip; - modem_irq_chip.name = "modem_irq"; - - /* Create the virtual IRQ:s needed */ - create_virtual_irq(MBOX_PAIR0_VIRT_IRQ, &modem_irq_chip); - create_virtual_irq(MBOX_PAIR1_VIRT_IRQ, &modem_irq_chip); - create_virtual_irq(MBOX_PAIR2_VIRT_IRQ, &modem_irq_chip); - - err = request_threaded_irq(IRQ_DB5500_MODEM, NULL, - modem_cpu_irq_handler, IRQF_ONESHOT, - "modem_irq", mi); - if (err) - pr_err("modem_irq: Could not register IRQ %d\n", - IRQ_DB5500_MODEM); - - return 0; -} - -arch_initcall(modem_irq_init); |