diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-ep93xx/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 6 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/dma-m2p.c | 411 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/dma.c | 108 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/include/mach/dma.h | 190 | ||||
| -rw-r--r-- | arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-imx/clock-imx25.c | 7 | ||||
| -rw-r--r-- | arch/arm/mach-mx5/clock-mx51-mx53.c | 11 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2410/include/mach/spi-gpio.h | 28 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2410/mach-qt2410.c | 34 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/mach-jive.c | 41 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2440/mach-gta02.c | 1 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/devices/platform-spi_imx.c | 12 |
13 files changed, 226 insertions, 629 deletions
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile index 6b7c41d155d..3cedcf2d39e 100644 --- a/arch/arm/mach-ep93xx/Makefile +++ b/arch/arm/mach-ep93xx/Makefile @@ -1,11 +1,13 @@ # # Makefile for the linux kernel. # -obj-y := core.o clock.o dma-m2p.o +obj-y := core.o clock.o obj-m := obj-n := obj- := +obj-$(CONFIG_EP93XX_DMA) += dma.o + obj-$(CONFIG_MACH_ADSSPHERE) += adssphere.o obj-$(CONFIG_MACH_EDB93XX) += edb93xx.o obj-$(CONFIG_MACH_GESBC9312) += gesbc9312.o diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index c488e4bd61e..c60f081e930 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -506,11 +506,15 @@ static struct resource ep93xx_spi_resources[] = { }, }; +static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32); + static struct platform_device ep93xx_spi_device = { .name = "ep93xx-spi", .id = 0, .dev = { - .platform_data = &ep93xx_spi_master_data, + .platform_data = &ep93xx_spi_master_data, + .coherent_dma_mask = DMA_BIT_MASK(32), + .dma_mask = &ep93xx_spi_dma_mask, }, .num_resources = ARRAY_SIZE(ep93xx_spi_resources), .resource = ep93xx_spi_resources, diff --git a/arch/arm/mach-ep93xx/dma-m2p.c b/arch/arm/mach-ep93xx/dma-m2p.c deleted file mode 100644 index a696d354b1f..00000000000 --- a/arch/arm/mach-ep93xx/dma-m2p.c +++ /dev/null @@ -1,411 +0,0 @@ -/* - * arch/arm/mach-ep93xx/dma-m2p.c - * M2P DMA handling for Cirrus EP93xx chips. - * - * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> - * Copyright (C) 2006 Applied Data Systems - * - * Copyright (C) 2009 Ryan Mallon <ryan@bluewatersys.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - */ - -/* - * On the EP93xx chip the following peripherals my be allocated to the 10 - * Memory to Internal Peripheral (M2P) channels (5 transmit + 5 receive). - * - * I2S contains 3 Tx and 3 Rx DMA Channels - * AAC contains 3 Tx and 3 Rx DMA Channels - * UART1 contains 1 Tx and 1 Rx DMA Channels - * UART2 contains 1 Tx and 1 Rx DMA Channels - * UART3 contains 1 Tx and 1 Rx DMA Channels - * IrDA contains 1 Tx and 1 Rx DMA Channels - * - * SSP and IDE use the Memory to Memory (M2M) channels and are not covered - * with this implementation. - */ - -#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/io.h> - -#include <mach/dma.h> -#include <mach/hardware.h> - -#define M2P_CONTROL 0x00 -#define M2P_CONTROL_STALL_IRQ_EN (1 << 0) -#define M2P_CONTROL_NFB_IRQ_EN (1 << 1) -#define M2P_CONTROL_ERROR_IRQ_EN (1 << 3) -#define M2P_CONTROL_ENABLE (1 << 4) -#define M2P_INTERRUPT 0x04 -#define M2P_INTERRUPT_STALL (1 << 0) -#define M2P_INTERRUPT_NFB (1 << 1) -#define M2P_INTERRUPT_ERROR (1 << 3) -#define M2P_PPALLOC 0x08 -#define M2P_STATUS 0x0c -#define M2P_REMAIN 0x14 -#define M2P_MAXCNT0 0x20 -#define M2P_BASE0 0x24 -#define M2P_MAXCNT1 0x30 -#define M2P_BASE1 0x34 - -#define STATE_IDLE 0 /* Channel is inactive. */ -#define STATE_STALL 1 /* Channel is active, no buffers pending. */ -#define STATE_ON 2 /* Channel is active, one buffer pending. */ -#define STATE_NEXT 3 /* Channel is active, two buffers pending. */ - -struct m2p_channel { - char *name; - void __iomem *base; - int irq; - - struct clk *clk; - spinlock_t lock; - - void *client; - unsigned next_slot:1; - struct ep93xx_dma_buffer *buffer_xfer; - struct ep93xx_dma_buffer *buffer_next; - struct list_head buffers_pending; -}; - -static struct m2p_channel m2p_rx[] = { - {"m2p1", EP93XX_DMA_BASE + 0x0040, IRQ_EP93XX_DMAM2P1}, - {"m2p3", EP93XX_DMA_BASE + 0x00c0, IRQ_EP93XX_DMAM2P3}, - {"m2p5", EP93XX_DMA_BASE + 0x0200, IRQ_EP93XX_DMAM2P5}, - {"m2p7", EP93XX_DMA_BASE + 0x0280, IRQ_EP93XX_DMAM2P7}, - {"m2p9", EP93XX_DMA_BASE + 0x0300, IRQ_EP93XX_DMAM2P9}, - {NULL}, -}; - -static struct m2p_channel m2p_tx[] = { - {"m2p0", EP93XX_DMA_BASE + 0x0000, IRQ_EP93XX_DMAM2P0}, - {"m2p2", EP93XX_DMA_BASE + 0x0080, IRQ_EP93XX_DMAM2P2}, - {"m2p4", EP93XX_DMA_BASE + 0x0240, IRQ_EP93XX_DMAM2P4}, - {"m2p6", EP93XX_DMA_BASE + 0x02c0, IRQ_EP93XX_DMAM2P6}, - {"m2p8", EP93XX_DMA_BASE + 0x0340, IRQ_EP93XX_DMAM2P8}, - {NULL}, -}; - -static void feed_buf(struct m2p_channel *ch, struct ep93xx_dma_buffer *buf) -{ - if (ch->next_slot == 0) { - writel(buf->size, ch->base + M2P_MAXCNT0); - writel(buf->bus_addr, ch->base + M2P_BASE0); - } else { - writel(buf->size, ch->base + M2P_MAXCNT1); - writel(buf->bus_addr, ch->base + M2P_BASE1); - } - ch->next_slot ^= 1; -} - -static void choose_buffer_xfer(struct m2p_channel *ch) -{ - struct ep93xx_dma_buffer *buf; - - ch->buffer_xfer = NULL; - if (!list_empty(&ch->buffers_pending)) { - buf = list_entry(ch->buffers_pending.next, - struct ep93xx_dma_buffer, list); - list_del(&buf->list); - feed_buf(ch, buf); - ch->buffer_xfer = buf; - } -} - -static void choose_buffer_next(struct m2p_channel *ch) -{ - struct ep93xx_dma_buffer *buf; - - ch->buffer_next = NULL; - if (!list_empty(&ch->buffers_pending)) { - buf = list_entry(ch->buffers_pending.next, - struct ep93xx_dma_buffer, list); - list_del(&buf->list); - feed_buf(ch, buf); - ch->buffer_next = buf; - } -} - -static inline void m2p_set_control(struct m2p_channel *ch, u32 v) -{ - /* - * The control register must be read immediately after being written so - * that the internal state machine is correctly updated. See the ep93xx - * users' guide for details. - */ - writel(v, ch->base + M2P_CONTROL); - readl(ch->base + M2P_CONTROL); -} - -static inline int m2p_channel_state(struct m2p_channel *ch) -{ - return (readl(ch->base + M2P_STATUS) >> 4) & 0x3; -} - -static irqreturn_t m2p_irq(int irq, void *dev_id) -{ - struct m2p_channel *ch = dev_id; - struct ep93xx_dma_m2p_client *cl; - u32 irq_status, v; - int error = 0; - - cl = ch->client; - - spin_lock(&ch->lock); - irq_status = readl(ch->base + M2P_INTERRUPT); - - if (irq_status & M2P_INTERRUPT_ERROR) { - writel(M2P_INTERRUPT_ERROR, ch->base + M2P_INTERRUPT); - error = 1; - } - - if ((irq_status & (M2P_INTERRUPT_STALL | M2P_INTERRUPT_NFB)) == 0) { - spin_unlock(&ch->lock); - return IRQ_NONE; - } - - switch (m2p_channel_state(ch)) { - case STATE_IDLE: - pr_crit("dma interrupt without a dma buffer\n"); - BUG(); - break; - - case STATE_STALL: - cl->buffer_finished(cl->cookie, ch->buffer_xfer, 0, error); - if (ch->buffer_next != NULL) { - cl->buffer_finished(cl->cookie, ch->buffer_next, - 0, error); - } - choose_buffer_xfer(ch); - choose_buffer_next(ch); - if (ch->buffer_xfer != NULL) - cl->buffer_started(cl->cookie, ch->buffer_xfer); - break; - - case STATE_ON: - cl->buffer_finished(cl->cookie, ch->buffer_xfer, 0, error); - ch->buffer_xfer = ch->buffer_next; - choose_buffer_next(ch); - cl->buffer_started(cl->cookie, ch->buffer_xfer); - break; - - case STATE_NEXT: - pr_crit("dma interrupt while next\n"); - BUG(); - break; - } - - v = readl(ch->base + M2P_CONTROL) & ~(M2P_CONTROL_STALL_IRQ_EN | - M2P_CONTROL_NFB_IRQ_EN); - if (ch->buffer_xfer != NULL) - v |= M2P_CONTROL_STALL_IRQ_EN; - if (ch->buffer_next != NULL) - v |= M2P_CONTROL_NFB_IRQ_EN; - m2p_set_control(ch, v); - - spin_unlock(&ch->lock); - return IRQ_HANDLED; -} - -static struct m2p_channel *find_free_channel(struct ep93xx_dma_m2p_client *cl) -{ - struct m2p_channel *ch; - int i; - - if (cl->flags & EP93XX_DMA_M2P_RX) - ch = m2p_rx; - else - ch = m2p_tx; - - for (i = 0; ch[i].base; i++) { - struct ep93xx_dma_m2p_client *client; - - client = ch[i].client; - if (client != NULL) { - int port; - - port = cl->flags & EP93XX_DMA_M2P_PORT_MASK; - if (port == (client->flags & - EP93XX_DMA_M2P_PORT_MASK)) { - pr_warning("DMA channel already used by %s\n", - cl->name ? : "unknown client"); - return ERR_PTR(-EBUSY); - } - } - } - - for (i = 0; ch[i].base; i++) { - if (ch[i].client == NULL) - return ch + i; - } - - pr_warning("No free DMA channel for %s\n", - cl->name ? : "unknown client"); - return ERR_PTR(-ENODEV); -} - -static void channel_enable(struct m2p_channel *ch) -{ - struct ep93xx_dma_m2p_client *cl = ch->client; - u32 v; - - clk_enable(ch->clk); - - v = cl->flags & EP93XX_DMA_M2P_PORT_MASK; - writel(v, ch->base + M2P_PPALLOC); - - v = cl->flags & EP93XX_DMA_M2P_ERROR_MASK; - v |= M2P_CONTROL_ENABLE | M2P_CONTROL_ERROR_IRQ_EN; - m2p_set_control(ch, v); -} - -static void channel_disable(struct m2p_channel *ch) -{ - u32 v; - - v = readl(ch->base + M2P_CONTROL); - v &= ~(M2P_CONTROL_STALL_IRQ_EN | M2P_CONTROL_NFB_IRQ_EN); - m2p_set_control(ch, v); - - while (m2p_channel_state(ch) >= STATE_ON) - cpu_relax(); - - m2p_set_control(ch, 0x0); - - while (m2p_channel_state(ch) == STATE_STALL) - cpu_relax(); - - clk_disable(ch->clk); -} - -int ep93xx_dma_m2p_client_register(struct ep93xx_dma_m2p_client *cl) -{ - struct m2p_channel *ch; - int err; - - ch = find_free_channel(cl); - if (IS_ERR(ch)) - return PTR_ERR(ch); - - err = request_irq(ch->irq, m2p_irq, 0, cl->name ? : "dma-m2p", ch); - if (err) - return err; - - ch->client = cl; - ch->next_slot = 0; - ch->buffer_xfer = NULL; - ch->buffer_next = NULL; - INIT_LIST_HEAD(&ch->buffers_pending); - - cl->channel = ch; - - channel_enable(ch); - - return 0; -} -EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_client_register); - -void ep93xx_dma_m2p_client_unregister(struct ep93xx_dma_m2p_client *cl) -{ - struct m2p_channel *ch = cl->channel; - - channel_disable(ch); - free_irq(ch->irq, ch); - ch->client = NULL; -} -EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_client_unregister); - -void ep93xx_dma_m2p_submit(struct ep93xx_dma_m2p_client *cl, - struct ep93xx_dma_buffer *buf) -{ - struct m2p_channel *ch = cl->channel; - unsigned long flags; - u32 v; - - spin_lock_irqsave(&ch->lock, flags); - v = readl(ch->base + M2P_CONTROL); - if (ch->buffer_xfer == NULL) { - ch->buffer_xfer = buf; - feed_buf(ch, buf); - cl->buffer_started(cl->cookie, buf); - - v |= M2P_CONTROL_STALL_IRQ_EN; - m2p_set_control(ch, v); - - } else if (ch->buffer_next == NULL) { - ch->buffer_next = buf; - feed_buf(ch, buf); - - v |= M2P_CONTROL_NFB_IRQ_EN; - m2p_set_control(ch, v); - } else { - list_add_tail(&buf->list, &ch->buffers_pending); - } - spin_unlock_irqrestore(&ch->lock, flags); -} -EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_submit); - -void ep93xx_dma_m2p_submit_recursive(struct ep93xx_dma_m2p_client *cl, - struct ep93xx_dma_buffer *buf) -{ - struct m2p_channel *ch = cl->channel; - - list_add_tail(&buf->list, &ch->buffers_pending); -} -EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_submit_recursive); - -void ep93xx_dma_m2p_flush(struct ep93xx_dma_m2p_client *cl) -{ - struct m2p_channel *ch = cl->channel; - - channel_disable(ch); - ch->next_slot = 0; - ch->buffer_xfer = NULL; - ch->buffer_next = NULL; - INIT_LIST_HEAD(&ch->buffers_pending); - channel_enable(ch); -} -EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_flush); - -static int init_channel(struct m2p_channel *ch) -{ - ch->clk = clk_get(NULL, ch->name); - if (IS_ERR(ch->clk)) - return PTR_ERR(ch->clk); - - spin_lock_init(&ch->lock); - ch->client = NULL; - - return 0; -} - -static int __init ep93xx_dma_m2p_init(void) -{ - int i; - int ret; - - for (i = 0; m2p_rx[i].base; i++) { - ret = init_channel(m2p_rx + i); - if (ret) - return ret; - } - - for (i = 0; m2p_tx[i].base; i++) { - ret = init_channel(m2p_tx + i); - if (ret) - return ret; - } - - pr_info("M2P DMA subsystem initialized\n"); - return 0; -} -arch_initcall(ep93xx_dma_m2p_init); diff --git a/arch/arm/mach-ep93xx/dma.c b/arch/arm/mach-ep93xx/dma.c new file mode 100644 index 00000000000..5a257088125 --- /dev/null +++ b/arch/arm/mach-ep93xx/dma.c @@ -0,0 +1,108 @@ +/* + * arch/arm/mach-ep93xx/dma.c + * + * Platform support code for the EP93xx dmaengine driver. + * + * Copyright (C) 2011 Mika Westerberg + * + * This work is based on the original dma-m2p implementation with + * following copyrights: + * + * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> + * Copyright (C) 2006 Applied Data Systems + * Copyright (C) 2009 Ryan Mallon <rmallon@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/dmaengine.h> +#include <linux/dma-mapping.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> + +#include <mach/dma.h> +#include <mach/hardware.h> + +#define DMA_CHANNEL(_name, _base, _irq) \ + { .name = (_name), .base = (_base), .irq = (_irq) } + +/* + * DMA M2P channels. + * + * On the EP93xx chip the following peripherals my be allocated to the 10 + * Memory to Internal Peripheral (M2P) channels (5 transmit + 5 receive). + * + * I2S contains 3 Tx and 3 Rx DMA Channels + * AAC contains 3 Tx and 3 Rx DMA Channels + * UART1 contains 1 Tx and 1 Rx DMA Channels + * UART2 contains 1 Tx and 1 Rx DMA Channels + * UART3 contains 1 Tx and 1 Rx DMA Channels + * IrDA contains 1 Tx and 1 Rx DMA Channels + * + * Registers are mapped statically in ep93xx_map_io(). + */ +static struct ep93xx_dma_chan_data ep93xx_dma_m2p_channels[] = { + DMA_CHANNEL("m2p0", EP93XX_DMA_BASE + 0x0000, IRQ_EP93XX_DMAM2P0), + DMA_CHANNEL("m2p1", EP93XX_DMA_BASE + 0x0040, IRQ_EP93XX_DMAM2P1), + DMA_CHANNEL("m2p2", EP93XX_DMA_BASE + 0x0080, IRQ_EP93XX_DMAM2P2), + DMA_CHANNEL("m2p3", EP93XX_DMA_BASE + 0x00c0, IRQ_EP93XX_DMAM2P3), + DMA_CHANNEL("m2p4", EP93XX_DMA_BASE + 0x0240, IRQ_EP93XX_DMAM2P4), + DMA_CHANNEL("m2p5", EP93XX_DMA_BASE + 0x0200, IRQ_EP93XX_DMAM2P5), + DMA_CHANNEL("m2p6", EP93XX_DMA_BASE + 0x02c0, IRQ_EP93XX_DMAM2P6), + DMA_CHANNEL("m2p7", EP93XX_DMA_BASE + 0x0280, IRQ_EP93XX_DMAM2P7), + DMA_CHANNEL("m2p8", EP93XX_DMA_BASE + 0x0340, IRQ_EP93XX_DMAM2P8), + DMA_CHANNEL("m2p9", EP93XX_DMA_BASE + 0x0300, IRQ_EP93XX_DMAM2P9), +}; + +static struct ep93xx_dma_platform_data ep93xx_dma_m2p_data = { + .channels = ep93xx_dma_m2p_channels, + .num_channels = ARRAY_SIZE(ep93xx_dma_m2p_channels), +}; + +static struct platform_device ep93xx_dma_m2p_device = { + .name = "ep93xx-dma-m2p", + .id = -1, + .dev = { + .platform_data = &ep93xx_dma_m2p_data, + }, +}; + +/* + * DMA M2M channels. + * + * There are 2 M2M channels which support memcpy/memset and in addition simple + * hardware requests from/to SSP and IDE. We do not implement an external + * hardware requests. + * + * Registers are mapped statically in ep93xx_map_io(). + */ +static struct ep93xx_dma_chan_data ep93xx_dma_m2m_channels[] = { + DMA_CHANNEL("m2m0", EP93XX_DMA_BASE + 0x0100, IRQ_EP93XX_DMAM2M0), + DMA_CHANNEL("m2m1", EP93XX_DMA_BASE + 0x0140, IRQ_EP93XX_DMAM2M1), +}; + +static struct ep93xx_dma_platform_data ep93xx_dma_m2m_data = { + .channels = ep93xx_dma_m2m_channels, + .num_channels = ARRAY_SIZE(ep93xx_dma_m2m_channels), +}; + +static struct platform_device ep93xx_dma_m2m_device = { + .name = "ep93xx-dma-m2m", + .id = -1, + .dev = { + .platform_data = &ep93xx_dma_m2m_data, + }, +}; + +static int __init ep93xx_dma_init(void) +{ + platform_device_register(&ep93xx_dma_m2p_device); + platform_device_register(&ep93xx_dma_m2m_device); + return 0; +} +arch_initcall(ep93xx_dma_init); diff --git a/arch/arm/mach-ep93xx/include/mach/dma.h b/arch/arm/mach-ep93xx/include/mach/dma.h index 5e31b2b25da..46d4d876e6f 100644 --- a/arch/arm/mach-ep93xx/include/mach/dma.h +++ b/arch/arm/mach-ep93xx/include/mach/dma.h @@ -1,149 +1,93 @@ -/** - * DOC: EP93xx DMA M2P memory to peripheral and peripheral to memory engine - * - * The EP93xx DMA M2P subsystem handles DMA transfers between memory and - * peripherals. DMA M2P channels are available for audio, UARTs and IrDA. - * See chapter 10 of the EP93xx users guide for full details on the DMA M2P - * engine. - * - * See sound/soc/ep93xx/ep93xx-pcm.c for an example use of the DMA M2P code. - * - */ - #ifndef __ASM_ARCH_DMA_H #define __ASM_ARCH_DMA_H -#include <linux/list.h> #include <linux/types.h> +#include <linux/dmaengine.h> +#include <linux/dma-mapping.h> -/** - * struct ep93xx_dma_buffer - Information about a buffer to be transferred - * using the DMA M2P engine +/* + * M2P channels. * - * @list: Entry in DMA buffer list - * @bus_addr: Physical address of the buffer - * @size: Size of the buffer in bytes + * Note that these values are also directly used for setting the PPALLOC + * register. */ -struct ep93xx_dma_buffer { - struct list_head list; - u32 bus_addr; - u16 size; -}; +#define EP93XX_DMA_I2S1 0 +#define EP93XX_DMA_I2S2 1 +#define EP93XX_DMA_AAC1 2 +#define EP93XX_DMA_AAC2 3 +#define EP93XX_DMA_AAC3 4 +#define EP93XX_DMA_I2S3 5 +#define EP93XX_DMA_UART1 6 +#define EP93XX_DMA_UART2 7 +#define EP93XX_DMA_UART3 8 +#define EP93XX_DMA_IRDA 9 +/* M2M channels */ +#define EP93XX_DMA_SSP 10 +#define EP93XX_DMA_IDE 11 /** - * struct ep93xx_dma_m2p_client - Information about a DMA M2P client - * - * @name: Unique name for this client - * @flags: Client flags - * @cookie: User data to pass to callback functions - * @buffer_started: Non NULL function to call when a transfer is started. - * The arguments are the user data cookie and the DMA - * buffer which is starting. - * @buffer_finished: Non NULL function to call when a transfer is completed. - * The arguments are the user data cookie, the DMA buffer - * which has completed, and a boolean flag indicating if - * the transfer had an error. + * struct ep93xx_dma_data - configuration data for the EP93xx dmaengine + * @port: peripheral which is requesting the channel + * @direction: TX/RX channel + * @name: optional name for the channel, this is displayed in /proc/interrupts + * + * This information is passed as private channel parameter in a filter + * function. Note that this is only needed for slave/cyclic channels. For + * memcpy channels %NULL data should be passed. */ -struct ep93xx_dma_m2p_client { - char *name; - u8 flags; - void *cookie; - void (*buffer_started)(void *cookie, - struct ep93xx_dma_buffer *buf); - void (*buffer_finished)(void *cookie, - struct ep93xx_dma_buffer *buf, - int bytes, int error); - - /* private: Internal use only */ - void *channel; +struct ep93xx_dma_data { + int port; + enum dma_data_direction direction; + const char *name; }; -/* DMA M2P ports */ -#define EP93XX_DMA_M2P_PORT_I2S1 0x00 -#define EP93XX_DMA_M2P_PORT_I2S2 0x01 -#define EP93XX_DMA_M2P_PORT_AAC1 0x02 -#define EP93XX_DMA_M2P_PORT_AAC2 0x03 -#define EP93XX_DMA_M2P_PORT_AAC3 0x04 -#define EP93XX_DMA_M2P_PORT_I2S3 0x05 -#define EP93XX_DMA_M2P_PORT_UART1 0x06 -#define EP93XX_DMA_M2P_PORT_UART2 0x07 -#define EP93XX_DMA_M2P_PORT_UART3 0x08 -#define EP93XX_DMA_M2P_PORT_IRDA 0x09 -#define EP93XX_DMA_M2P_PORT_MASK 0x0f - -/* DMA M2P client flags */ -#define EP93XX_DMA_M2P_TX 0x00 /* Memory to peripheral */ -#define EP93XX_DMA_M2P_RX 0x10 /* Peripheral to memory */ - -/* - * DMA M2P client error handling flags. See the EP93xx users guide - * documentation on the DMA M2P CONTROL register for more details - */ -#define EP93XX_DMA_M2P_ABORT_ON_ERROR 0x20 /* Abort on peripheral error */ -#define EP93XX_DMA_M2P_IGNORE_ERROR 0x40 /* Ignore peripheral errors */ -#define EP93XX_DMA_M2P_ERROR_MASK 0x60 /* Mask of error bits */ - /** - * ep93xx_dma_m2p_client_register - Register a client with the DMA M2P - * subsystem - * - * @m2p: Client information to register - * returns 0 on success - * - * The DMA M2P subsystem allocates a channel and an interrupt line for the DMA - * client + * struct ep93xx_dma_chan_data - platform specific data for a DMA channel + * @name: name of the channel, used for getting the right clock for the channel + * @base: mapped registers + * @irq: interrupt number used by this channel */ -int ep93xx_dma_m2p_client_register(struct ep93xx_dma_m2p_client *m2p); +struct ep93xx_dma_chan_data { + const char *name; + void __iomem *base; + int irq; +}; /** - * ep93xx_dma_m2p_client_unregister - Unregister a client from the DMA M2P - * subsystem - * - * @m2p: Client to unregister + * struct ep93xx_dma_platform_data - platform data for the dmaengine driver + * @channels: array of channels which are passed to the driver + * @num_channels: number of channels in the array * - * Any transfers currently in progress will be completed in hardware, but - * ignored in software. + * This structure is passed to the DMA engine driver via platform data. For + * M2P channels, contract is that even channels are for TX and odd for RX. + * There is no requirement for the M2M channels. */ -void ep93xx_dma_m2p_client_unregister(struct ep93xx_dma_m2p_client *m2p); +struct ep93xx_dma_platform_data { + struct ep93xx_dma_chan_data *channels; + size_t num_channels; +}; -/** - * ep93xx_dma_m2p_submit - Submit a DMA M2P transfer - * - * @m2p: DMA Client to submit the transfer on - * @buf: DMA Buffer to submit - * - * If the current or next transfer positions are free on the M2P client then - * the transfer is started immediately. If not, the transfer is added to the - * list of pending transfers. This function must not be called from the - * buffer_finished callback for an M2P channel. - * - */ -void ep93xx_dma_m2p_submit(struct ep93xx_dma_m2p_client *m2p, - struct ep93xx_dma_buffer *buf); +static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan) +{ + return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p"); +} /** - * ep93xx_dma_m2p_submit_recursive - Put a DMA transfer on the pending list - * for an M2P channel + * ep93xx_dma_chan_direction - returns direction the channel can be used + * @chan: channel * - * @m2p: DMA Client to submit the transfer on - * @buf: DMA Buffer to submit - * - * This function must only be called from the buffer_finished callback for an - * M2P channel. It is commonly used to add the next transfer in a chained list - * of DMA transfers. + * This function can be used in filter functions to find out whether the + * channel supports given DMA direction. Only M2P channels have such + * limitation, for M2M channels the direction is configurable. */ -void ep93xx_dma_m2p_submit_recursive(struct ep93xx_dma_m2p_client *m2p, - struct ep93xx_dma_buffer *buf); +static inline enum dma_data_direction +ep93xx_dma_chan_direction(struct dma_chan *chan) +{ + if (!ep93xx_dma_chan_is_m2p(chan)) + return DMA_NONE; -/** - * ep93xx_dma_m2p_flush - Flush all pending transfers on a DMA M2P client - * - * @m2p: DMA client to flush transfers on - * - * Any transfers currently in progress will be completed in hardware, but - * ignored in software. - * - */ -void ep93xx_dma_m2p_flush(struct ep93xx_dma_m2p_client *m2p); + /* even channels are for TX, odd for RX */ + return (chan->chan_id % 2 == 0) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; +} #endif /* __ASM_ARCH_DMA_H */ diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h b/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h index 0a37961b345..9bb63ac13f0 100644 --- a/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h +++ b/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h @@ -7,9 +7,11 @@ struct spi_device; * struct ep93xx_spi_info - EP93xx specific SPI descriptor * @num_chipselect: number of chip selects on this board, must be * at least one + * @use_dma: use DMA for the transfers */ struct ep93xx_spi_info { int num_chipselect; + bool use_dma; }; /** diff --git a/arch/arm/mach-imx/clock-imx25.c b/arch/arm/mach-imx/clock-imx25.c index a65838fc061..af1c580b06b 100644 --- a/arch/arm/mach-imx/clock-imx25.c +++ b/arch/arm/mach-imx/clock-imx25.c @@ -282,9 +282,10 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("mxc-ehci.2", "usb", usbotg_clk) _REGISTER_CLOCK("fsl-usb2-udc", "usb", usbotg_clk) _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk) - _REGISTER_CLOCK("imx25-cspi.0", NULL, cspi1_clk) - _REGISTER_CLOCK("imx25-cspi.1", NULL, cspi2_clk) - _REGISTER_CLOCK("imx25-cspi.2", NULL, cspi3_clk) + /* i.mx25 has the i.mx35 type cspi */ + _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi1_clk) + _REGISTER_CLOCK("imx35-cspi.1", NULL, cspi2_clk) + _REGISTER_CLOCK("imx35-cspi.2", NULL, cspi3_clk) _REGISTER_CLOCK("mxc_pwm.0", NULL, pwm1_clk) _REGISTER_CLOCK("mxc_pwm.1", NULL, pwm2_clk) _REGISTER_CLOCK("mxc_pwm.2", NULL, pwm3_clk) diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c index 6b89c1bf4eb..cd79e3435e2 100644 --- a/arch/arm/mach-mx5/clock-mx51-mx53.c +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c @@ -1442,7 +1442,8 @@ static struct clk_lookup mx51_lookups[] = { _REGISTER_CLOCK(NULL, "gpt_32k", gpt_32k_clk) _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk) _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk) - _REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk) + /* i.mx51 has the i.mx35 type cspi */ + _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk) @@ -1471,9 +1472,11 @@ static struct clk_lookup mx53_lookups[] = { _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_mx53_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_mx53_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.3", NULL, esdhc4_mx53_clk) - _REGISTER_CLOCK("imx53-ecspi.0", NULL, ecspi1_clk) - _REGISTER_CLOCK("imx53-ecspi.1", NULL, ecspi2_clk) - _REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk) + /* i.mx53 has the i.mx51 type ecspi */ + _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk) + _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk) + /* i.mx53 has the i.mx25 type cspi */ + _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi_clk) _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk) _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk) }; diff --git a/arch/arm/mach-s3c2410/include/mach/spi-gpio.h b/arch/arm/mach-s3c2410/include/mach/spi-gpio.h deleted file mode 100644 index dcef2287cb3..00000000000 --- a/arch/arm/mach-s3c2410/include/mach/spi-gpio.h +++ /dev/null @@ -1,28 +0,0 @@ -/* arch/arm/mach-s3c2410/include/mach/spi-gpio.h - * - * Copyright (c) 2006 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * - * S3C2410 - SPI Controller platform_device info - * - * 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. -*/ - -#ifndef __ASM_ARCH_SPIGPIO_H -#define __ASM_ARCH_SPIGPIO_H __FILE__ - -struct s3c2410_spigpio_info { - unsigned long pin_clk; - unsigned long pin_mosi; - unsigned long pin_miso; - - int num_chipselect; - int bus_num; - - void (*chip_select)(struct s3c2410_spigpio_info *spi, int cs); -}; - - -#endif /* __ASM_ARCH_SPIGPIO_H */ diff --git a/arch/arm/mach-s3c2410/mach-qt2410.c b/arch/arm/mach-s3c2410/mach-qt2410.c index e8f49feef28..f44f77531b1 100644 --- a/arch/arm/mach-s3c2410/mach-qt2410.c +++ b/arch/arm/mach-s3c2410/mach-qt2410.c @@ -32,7 +32,7 @@ #include <linux/platform_device.h> #include <linux/serial_core.h> #include <linux/spi/spi.h> -#include <linux/spi/spi_bitbang.h> +#include <linux/spi/spi_gpio.h> #include <linux/io.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> @@ -53,8 +53,6 @@ #include <mach/fb.h> #include <plat/nand.h> #include <plat/udc.h> -#include <mach/spi.h> -#include <mach/spi-gpio.h> #include <plat/iic.h> #include <plat/common-smdk.h> @@ -216,32 +214,16 @@ static struct platform_device qt2410_led = { /* SPI */ -static void spi_gpio_cs(struct s3c2410_spigpio_info *spi, int cs) -{ - switch (cs) { - case BITBANG_CS_ACTIVE: - gpio_set_value(S3C2410_GPB(5), 0); - break; - case BITBANG_CS_INACTIVE: - gpio_set_value(S3C2410_GPB(5), 1); - break; - } -} - -static struct s3c2410_spigpio_info spi_gpio_cfg = { - .pin_clk = S3C2410_GPG(7), - .pin_mosi = S3C2410_GPG(6), - .pin_miso = S3C2410_GPG(5), - .chip_select = &spi_gpio_cs, +static struct spi_gpio_platform_data spi_gpio_cfg = { + .sck = S3C2410_GPG(7), + .mosi = S3C2410_GPG(6), + .miso = S3C2410_GPG(5), }; - static struct platform_device qt2410_spi = { - .name = "s3c24xx-spi-gpio", - .id = 1, - .dev = { - .platform_data = &spi_gpio_cfg, - }, + .name = "spi-gpio", + .id = 1, + .dev.platform_data = &spi_gpio_cfg, }; /* Board devices */ diff --git a/arch/arm/mach-s3c2412/mach-jive.c b/arch/arm/mach-s3c2412/mach-jive.c index 85dcaeb9e62..5eeb47580b0 100644 --- a/arch/arm/mach-s3c2412/mach-jive.c +++ b/arch/arm/mach-s3c2412/mach-jive.c @@ -25,6 +25,7 @@ #include <video/ili9320.h> #include <linux/spi/spi.h> +#include <linux/spi/spi_gpio.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> @@ -38,7 +39,6 @@ #include <mach/regs-gpio.h> #include <mach/regs-mem.h> #include <mach/regs-lcd.h> -#include <mach/spi-gpio.h> #include <mach/fb.h> #include <asm/mach-types.h> @@ -389,45 +389,30 @@ static struct ili9320_platdata jive_lcm_config = { /* LCD SPI support */ -static void jive_lcd_spi_chipselect(struct s3c2410_spigpio_info *spi, int cs) -{ - gpio_set_value(S3C2410_GPB(7), cs ? 0 : 1); -} - -static struct s3c2410_spigpio_info jive_lcd_spi = { - .bus_num = 1, - .pin_clk = S3C2410_GPG(8), - .pin_mosi = S3C2410_GPB(8), - .num_chipselect = 1, - .chip_select = jive_lcd_spi_chipselect, +static struct spi_gpio_platform_data jive_lcd_spi = { + .sck = S3C2410_GPG(8), + .mosi = S3C2410_GPB(8), + .miso = SPI_GPIO_NO_MISO, }; static struct platform_device jive_device_lcdspi = { - .name = "spi_s3c24xx_gpio", + .name = "spi-gpio", .id = 1, - .num_resources = 0, .dev.platform_data = &jive_lcd_spi, }; -/* WM8750 audio code SPI definition */ -static void jive_wm8750_chipselect(struct s3c2410_spigpio_info *spi, int cs) -{ - gpio_set_value(S3C2410_GPH(10), cs ? 0 : 1); -} +/* WM8750 audio code SPI definition */ -static struct s3c2410_spigpio_info jive_wm8750_spi = { - .bus_num = 2, - .pin_clk = S3C2410_GPB(4), - .pin_mosi = S3C2410_GPB(9), - .num_chipselect = 1, - .chip_select = jive_wm8750_chipselect, +static struct spi_gpio_platform_data jive_wm8750_spi = { + .sck = S3C2410_GPB(4), + .mosi = S3C2410_GPB(9), + .miso = SPI_GPIO_NO_MISO, }; static struct platform_device jive_device_wm8750 = { - .name = "spi_s3c24xx_gpio", + .name = "spi-gpio", .id = 2, - .num_resources = 0, .dev.platform_data = &jive_wm8750_spi, }; @@ -441,12 +426,14 @@ static struct spi_board_info __initdata jive_spi_devs[] = { .mode = SPI_MODE_3, /* CPOL=1, CPHA=1 */ .max_speed_hz = 100000, .platform_data = &jive_lcm_config, + .controller_data = (void *)S3C2410_GPB(7), }, { .modalias = "WM8750", .bus_num = 2, .chip_select = 0, .mode = SPI_MODE_0, /* CPOL=0, CPHA=0 */ .max_speed_hz = 100000, + .controller_data = (void *)S3C2410_GPH(10), }, }; diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c index 716662008ce..c10ddf4ed7f 100644 --- a/arch/arm/mach-s3c2440/mach-gta02.c +++ b/arch/arm/mach-s3c2440/mach-gta02.c @@ -74,7 +74,6 @@ #include <mach/fb.h> #include <mach/spi.h> -#include <mach/spi-gpio.h> #include <plat/usb-control.h> #include <mach/regs-mem.h> #include <mach/hardware.h> diff --git a/arch/arm/plat-mxc/devices/platform-spi_imx.c b/arch/arm/plat-mxc/devices/platform-spi_imx.c index f97eb3615b2..9bfae8bd5b8 100644 --- a/arch/arm/plat-mxc/devices/platform-spi_imx.c +++ b/arch/arm/plat-mxc/devices/platform-spi_imx.c @@ -40,9 +40,10 @@ const struct imx_spi_imx_data imx21_cspi_data[] __initconst = { #endif #ifdef CONFIG_SOC_IMX25 +/* i.mx25 has the i.mx35 type cspi */ const struct imx_spi_imx_data imx25_cspi_data[] __initconst = { #define imx25_cspi_data_entry(_id, _hwid) \ - imx_spi_imx_data_entry(MX25, CSPI, "imx25-cspi", _id, _hwid, SZ_16K) + imx_spi_imx_data_entry(MX25, CSPI, "imx35-cspi", _id, _hwid, SZ_16K) imx25_cspi_data_entry(0, 1), imx25_cspi_data_entry(1, 2), imx25_cspi_data_entry(2, 3), @@ -79,8 +80,9 @@ const struct imx_spi_imx_data imx35_cspi_data[] __initconst = { #endif /* ifdef CONFIG_SOC_IMX35 */ #ifdef CONFIG_SOC_IMX51 +/* i.mx51 has the i.mx35 type cspi */ const struct imx_spi_imx_data imx51_cspi_data __initconst = - imx_spi_imx_data_entry_single(MX51, CSPI, "imx51-cspi", 2, , SZ_4K); + imx_spi_imx_data_entry_single(MX51, CSPI, "imx35-cspi", 2, , SZ_4K); const struct imx_spi_imx_data imx51_ecspi_data[] __initconst = { #define imx51_ecspi_data_entry(_id, _hwid) \ @@ -91,12 +93,14 @@ const struct imx_spi_imx_data imx51_ecspi_data[] __initconst = { #endif /* ifdef CONFIG_SOC_IMX51 */ #ifdef CONFIG_SOC_IMX53 +/* i.mx53 has the i.mx35 type cspi */ const struct imx_spi_imx_data imx53_cspi_data __initconst = - imx_spi_imx_data_entry_single(MX53, CSPI, "imx53-cspi", 0, , SZ_4K); + imx_spi_imx_data_entry_single(MX53, CSPI, "imx35-cspi", 0, , SZ_4K); +/* i.mx53 has the i.mx51 type ecspi */ const struct imx_spi_imx_data imx53_ecspi_data[] __initconst = { #define imx53_ecspi_data_entry(_id, _hwid) \ - imx_spi_imx_data_entry(MX53, ECSPI, "imx53-ecspi", _id, _hwid, SZ_4K) + imx_spi_imx_data_entry(MX53, ECSPI, "imx51-ecspi", _id, _hwid, SZ_4K) imx53_ecspi_data_entry(0, 1), imx53_ecspi_data_entry(1, 2), }; |