/* * Toshiba TC6393XB SoC support * * Copyright(c) 2005-2006 Chris Humbert * Copyright(c) 2005 Dirk Opfer * Copyright(c) 2005 Ian Molton * Copyright(c) 2007 Dmitry Baryshkov * * Based on code written by Sharp/Lineo for 2.4 kernels * Based on locomo.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #define SCR_REVID 0x08 /* b Revision ID */ #define SCR_ISR 0x50 /* b Interrupt Status */ #define SCR_IMR 0x52 /* b Interrupt Mask */ #define SCR_IRR 0x54 /* b Interrupt Routing */ #define SCR_GPER 0x60 /* w GP Enable */ #define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */ #define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */ #define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */ #define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */ #define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */ #define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */ #define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */ #define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */ #define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */ #define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */ #define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */ #define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */ #define SCR_CCR 0x98 /* w Clock Control */ #define SCR_PLL2CR 0x9a /* w PLL2 Control */ #define SCR_PLL1CR 0x9c /* l PLL1 Control */ #define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */ #define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */ #define SCR_FER 0xe0 /* b Function Enable */ #define SCR_MCR 0xe4 /* w Mode Control */ #define SCR_CONFIG 0xfc /* b Configuration Control */ #define SCR_DEBUG 0xff /* b Debug */ #define SCR_CCR_CK32K BIT(0) #define SCR_CCR_USBCK BIT(1) #define SCR_CCR_UNK1 BIT(4) #define SCR_CCR_MCLK_MASK (7 << 8) #define SCR_CCR_MCLK_OFF (0 << 8) #define SCR_CCR_MCLK_12 (1 << 8) #define SCR_CCR_MCLK_24 (2 << 8) #define SCR_CCR_MCLK_48 (3 << 8) #define SCR_CCR_HCLK_MASK (3 << 12) #define SCR_CCR_HCLK_24 (0 << 12) #define SCR_CCR_HCLK_48 (1 << 12) #define SCR_FER_USBEN BIT(0) /* USB host enable */ #define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */ #define SCR_FER_SLCDEN BIT(2) /* SLCD enable */ #define SCR_MCR_RDY_MASK (3 << 0) #define SCR_MCR_RDY_OPENDRAIN (0 << 0) #define SCR_MCR_RDY_TRISTATE (1 << 0) #define SCR_MCR_RDY_PUSHPULL (2 << 0) #define SCR_MCR_RDY_UNK BIT(2) #define SCR_MCR_RDY_EN BIT(3) #define SCR_MCR_INT_MASK (3 << 4) #define SCR_MCR_INT_OPENDRAIN (0 << 4) #define SCR_MCR_INT_TRISTATE (1 << 4) #define SCR_MCR_INT_PUSHPULL (2 << 4) #define SCR_MCR_INT_UNK BIT(6) #define SCR_MCR_INT_EN BIT(7) /* bits 8 - 16 are unknown */ #define TC_GPIO_BIT(i) (1 << (i & 0x7)) /*--------------------------------------------------------------------------*/ struct tc6393xb { void __iomem *scr; struct gpio_chip gpio; struct clk *clk; /* 3,6 Mhz */ spinlock_t lock; /* protects RMW cycles */ struct { u8 fer; u16 ccr; u8 gpi_bcr[3]; u8 gpo_dsr[3]; u8 gpo_doecr[3]; } suspend_state; struct resource rscr; struct resource *iomem; int irq; int irq_base; }; enum { TC6393XB_CELL_NAND, }; /*--------------------------------------------------------------------------*/ static int tc6393xb_nand_enable(struct platform_device *nand) { struct platform_device *dev = to_platform_device(nand->dev.parent); struct tc6393xb *tc6393xb = platform_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&tc6393xb->lock, flags); /* SMD buffer on */ dev_dbg(&dev->dev, "SMD buffer on\n"); iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1)); spin_unlock_irqrestore(&tc6393xb->lock, flags); return 0; } static struct resource __devinitdata tc6393xb_nand_resources[] = { { .start = 0x0100, .end = 0x01ff, .flags = IORESOURCE_MEM, }, { .start = 0x1000, .end = 0x1007, .flags = IORESOURCE_MEM, }, { .start = IRQ_TC6393_NAND, .end = IRQ_TC6393_NAND, .flags = IORESOURCE_IRQ, }, }; static struct mfd_cell __devinitdata tc6393xb_cells[] = { [TC6393XB_CELL_NAND] = { .name = "tmio-nand", .enable = tc6393xb_nand_enable, .num_resources = ARRAY_SIZE(tc6393xb_nand_resources), .resources = tc6393xb_nand_resources, }, }; /*--------------------------------------------------------------------------*/ static int tc6393xb_gpio_get(struct gpio_chip *chip, unsigned offset) { struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio); /* XXX: does dsr also represent inputs? */ return ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8)) & TC_GPIO_BIT(offset); } static void __tc6393xb_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio); u8 dsr; dsr = ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8)); if (value) dsr |= TC_GPIO_BIT(offset); else dsr &= ~TC_GPIO_BIT(offset); iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8)); } static void tc6393xb_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio); unsigned long flags; spin_lock_irqsave(&tc6393xb->lock, flags); __tc6393xb_gpio_set(chip, offset, value); spin_unlock_irqrestore(&tc6393xb->lock, flags); } static int tc6393xb_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio); unsigned long flags; u8 doecr; spin_lock_irqsave(&tc6393xb->lock, flags); doecr = ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8)); doecr &= ~TC_GPIO_BIT(offset); iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8)); spin_unlock_irqrestore(&tc6393xb->lock, flags); return 0; } static int tc6393xb_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio); unsigned long flags; u8 doecr; spin_lock_irqsave(&tc6393xb->lock, flags); __tc6393xb_gpio_set(chip, offset, value); doecr = ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8)); doecr |= TC_GPIO_BIT(offset); iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8)); spin_unlock_irqrestore(&tc6393xb->lock, flags); return 0; } static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base) { tc6393xb->gpio.label = "tc6393xb"; tc6393xb->gpio.base = gpio_base; tc6393xb->gpio.ngpio = 16; tc6393xb->gpio.set = tc6393xb_gpio_set; tc6393xb->gpio.get = tc6393xb_gpio_get; tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input; tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output; return gpiochip_add(&tc6393xb->gpio); } /*--------------------------------------------------------------------------*/ static void tc6393xb_irq(unsigned int irq, struct irq_desc *desc) { struct tc6393xb *tc6393xb = get_irq_data(irq); unsigned int isr; unsigned int i, irq_base; irq_base = tc6393xb->irq_base; while ((isr = ioread8(tc6393xb->scr + SCR_ISR) & ~ioread8(tc6393xb->scr + SCR_IMR))) for (i = 0; i < TC6393XB_NR_IRQS; i++) { if (isr & (1 << i)) generic_handle_irq(irq_base + i); } } static void tc6393xb_irq_ack(unsigned int irq) { } static void tc6393xb_irq_mask(unsigned int irq) { struct tc6393xb *tc6393xb = get_irq_chip_data(irq); unsigned long flags; u8 imr; spin_lock_irqsave(&tc6393xb->lock, flags); imr = ioread8(tc6393xb->scr + SCR_IMR); imr |= 1 << (irq - tc6393xb->irq_base); iowrite8(imr, tc6393xb->scr + SCR_IMR); spin_unlock_irqrestore(&tc6393xb->lock, flags); } static void tc6393xb_irq_unmask(unsigned int irq) { struct tc6393xb *tc6393xb = get_irq_chip_data(irq); unsigned long flags; u8 imr; spin_lock_irqsave(&tc6393xb->lock, flags); imr = ioread8(tc6393xb->scr + SCR_IMR); imr &= ~(1 << (irq - tc6393xb->irq_base)); iowrite8(imr, tc6393xb->scr + SCR_IMR); spin_unlock_irqrestore(&tc6393xb->lock, flags); } static struct irq_chip tc6393xb_chip = { .name = "tc6393xb", .ack = tc6393xb_irq_ack, .mask = tc6393xb_irq_mask, .unmask = tc6393xb_irq_unmask, }; static void tc6393xb_attach_irq(struct platform_device *dev) { struct tc6393xb *tc6393xb = platform_get_drvdata(dev); unsigned int irq, irq_base; irq_base = tc6393xb->irq_base; for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) { set_irq_chip(irq, &tc6393xb_chip); set_irq_chip_data(irq, tc6393xb); set_irq_handler(irq, handle_edge_irq); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); } set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING); set_irq_data(tc6393xb->irq, tc6393xb); set_irq_chained_handler(tc6393xb->irq, tc6393xb_irq); } static void tc6393xb_detach_irq(struct platform_device *dev) { struct tc6393xb *tc6393xb = platform_get_drvdata(dev); unsigned int irq, irq_base; set_irq_chained_handler(tc6393xb->irq, NULL); set_irq_data(tc6393xb->irq, NULL); irq_base = tc6393xb->irq_base; for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) { set_irq_flags(irq, 0); set_irq_chip(irq, NULL); set_irq_chip_data(irq, NULL); } } /*--------------------------------------------------------------------------*/ static int tc6393xb_hw_init(struct platform_device *dev) { struct tc6393xb_platform_data *tcpd = dev->dev.platform_data; struct tc6393xb *tc6393xb = platform_get_drvdata(dev); int i; iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER); iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR); iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR); iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN | SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN | BIT(15), tc6393xb->scr + SCR_MCR); iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER); iowrite8(0, tc6393xb->scr + SCR_IRR); iowrite8(0xbf, tc6393xb->scr + SCR_IMR); for (i = 0; i < 3; i++) { iowrite8(tc6393xb->suspend_state.gpo_dsr[i], tc6393xb->scr + SCR_GPO_DSR(i)); iowrite8(tc6393xb->suspend_state.gpo_doecr[i], tc6393xb->scr + SCR_GPO_DOECR(i)); iowrite8(tc6393xb->suspend_state.gpi_bcr[i], tc6393xb->scr + SCR_GPI_BCR(i)); } return 0; } static int __devinit tc6393xb_probe(struct platform_device *dev) { struct tc6393xb_platform_data *tcpd = dev->dev.platform_data; struct tc6393xb *tc6393xb; struct resource *iomem; struct resource *rscr; int retval, temp; int i; iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!iomem) return -EINVAL; tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL); if (!tc6393xb) { retval = -ENOMEM; goto err_kzalloc; } spin_lock_init(&tc6393xb->lock); platform_set_drvdata(dev, tc6393xb); tc6393xb->iomem = iomem; tc6393xb->irq = platform_get_irq(dev, 0); tc6393xb->irq_base = tcpd->irq_base; tc6393xb->clk = clk_get(&dev->dev, "GPIO27_CLK" /* "CK3P6MI" */); if (IS_ERR(tc6393xb->clk)) { retval = PTR_ERR(tc6393xb->clk); goto err_clk_get; } rscr = &tc6393xb->rscr; rscr->name = "tc6393xb-core"; rscr->start = iomem->start; rscr->end = iomem->start + 0xff; rscr->flags = IORESOURCE_MEM; retval = request_resource(iomem, rscr); if (retval) goto err_request_scr; tc6393xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1); if (!tc6393xb->scr) { retval = -ENOMEM; goto err_ioremap; } retval = clk_enable(tc6393xb->clk); if (retval) goto err_clk_enable; retval = tcpd->enable(dev); if (retval) goto err_enable; tc6393xb->suspend_state.fer = 0; for (i = 0; i < 3; i++) { tc6393xb->suspend_state.gpo_dsr[i] = (tcpd->scr_gpo_dsr >> (8 * i)) & 0xff; tc6393xb->suspend_state.gpo_doecr[i] = (tcpd->scr_gpo_doecr >> (8 * i)) & 0xff; } /* * It may be necessary to change this back to * platform-dependant code */ tc6393xb->suspend_state.ccr = SCR_CCR_UNK1 | SCR_CCR_HCLK_48; retval = tc6393xb_hw_init(dev); if (retval) goto err_hw_init; printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n", ioread8(tc6393xb->scr + SCR_REVID), (unsigned long) iomem->start, tc6393xb->irq); tc6393xb->gpio.base = -1; if (tcpd->gpio_base >= 0) { retval = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base); if (retval) goto err_gpio_add; } if (tc6393xb->irq) tc6393xb_attach_irq(dev); tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data; tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = &tc6393xb_cells[TC6393XB_CELL_NAND]; tc6393xb_cells[TC6393XB_CELL_NAND].data_size = sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]); retval = mfd_add_devices(&dev->dev, dev->id, tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells), iomem, tcpd->irq_base); return 0; if (tc6393xb->irq) tc6393xb_detach_irq(dev); err_gpio_add: if (tc6393xb->gpio.base != -1) temp = gpiochip_remove(&tc6393xb->gpio); err_hw_init: tcpd->disable(dev); err_clk_enable: clk_disable(tc6393xb->clk); err_enable: iounmap(tc6393xb->scr); err_ioremap: release_resource(&tc6393xb->rscr); err_request_scr: clk_put(tc6393xb->clk); err_clk_get: kfree(tc6393xb); err_kzalloc: return retval; } static int __devexit tc6393xb_remove(struct platform_device *dev) { struct tc6393xb_platform_data *tcpd = dev->dev.platform_data; struct tc6393xb *tc6393xb = platform_get_drvdata(dev); int ret; mfd_remove_devices(&dev->dev); if (tc6393xb->irq) tc6393xb_detach_irq(dev); if (tc6393xb->gpio.base != -1) { ret = gpiochip_remove(&tc6393xb->gpio); if (ret) { dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret); return ret; } } ret = tcpd->disable(dev); clk_disable(tc6393xb->clk); iounmap(tc6393xb->scr); release_resource(&tc6393xb->rscr); platform_set_drvdata(dev, NULL); clk_put(tc6393xb->clk); kfree(tc6393xb); return ret; } #ifdef CONFIG_PM static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state) { struct tc6393xb_platform_data *tcpd = dev->dev.platform_data; struct tc6393xb *tc6393xb = platform_get_drvdata(dev); int i; tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR); tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER); for (i = 0; i < 3; i++) { tc6393xb->suspend_state.gpo_dsr[i] = ioread8(tc6393xb->scr + SCR_GPO_DSR(i)); tc6393xb->suspend_state.gpo_doecr[i] = ioread8(tc6393xb->scr + SCR_GPO_DOECR(i)); tc6393xb->suspend_state.gpi_bcr[i] = ioread8(tc6393xb->scr + SCR_GPI_BCR(i)); } return tcpd->suspend(dev); } static int tc6393xb_resume(struct platform_device *dev) { struct tc6393xb_platform_data *tcpd = dev->dev.platform_data; int ret = tcpd->resume(dev); if (ret) return ret; return tc6393xb_hw_init(dev); } #else #define tc6393xb_suspend NULL #define tc6393xb_resume NULL #endif static struct platform_driver tc6393xb_driver = { .probe = tc6393xb_probe, .remove = __devexit_p(tc6393xb_remove), .suspend = tc6393xb_suspend, .resume = tc6393xb_resume, .driver = { .name = "tc6393xb", .owner = THIS_MODULE, }, }; static int __init tc6393xb_init(void) { return platform_driver_register(&tc6393xb_driver); } static void __exit tc6393xb_exit(void) { platform_driver_unregister(&tc6393xb_driver); } subsys_initcall(tc6393xb_init); module_exit(tc6393xb_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer"); MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller"); MODULE_ALIAS("platform:tc6393xb");