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/*
 * Copyright (c) 2006 Cisco Systems, Inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef MLX4_CMD_H
#define MLX4_CMD_H

#include <linux/dma-mapping.h>
#include <linux/if_link.h>
#include <linux/mlx4/device.h>
#include <linux/netdevice.h>

enum {
	/* initialization and general commands */
	MLX4_CMD_SYS_EN		 = 0x1,
	MLX4_CMD_SYS_DIS	 = 0x2,
	MLX4_CMD_MAP_FA		 = 0xfff,
	MLX4_CMD_UNMAP_FA	 = 0xffe,
	MLX4_CMD_RUN_FW		 = 0xff6,
	MLX4_CMD_MOD_STAT_CFG	 = 0x34,
	MLX4_CMD_QUERY_DEV_CAP	 = 0x3,
	MLX4_CMD_QUERY_FW	 = 0x4,
	MLX4_CMD_ENABLE_LAM	 = 0xff8,
	MLX4_CMD_DISABLE_LAM	 = 0xff7,
	MLX4_CMD_QUERY_DDR	 = 0x5,
	MLX4_CMD_QUERY_ADAPTER	 = 0x6,
	MLX4_CMD_INIT_HCA	 = 0x7,
	MLX4_CMD_CLOSE_HCA	 = 0x8,
	MLX4_CMD_INIT_PORT	 = 0x9,
	MLX4_CMD_CLOSE_PORT	 = 0xa,
	MLX4_CMD_QUERY_HCA	 = 0xb,
	MLX4_CMD_QUERY_PORT	 = 0x43,
	MLX4_CMD_SENSE_PORT	 = 0x4d,
	MLX4_CMD_HW_HEALTH_CHECK = 0x50,
	MLX4_CMD_SET_PORT	 = 0xc,
	MLX4_CMD_SET_NODE	 = 0x5a,
	MLX4_CMD_QUERY_FUNC	 = 0x56,
	MLX4_CMD_ACCESS_DDR	 = 0x2e,
	MLX4_CMD_MAP_ICM	 = 0xffa,
	MLX4_CMD_UNMAP_ICM	 = 0xff9,
	MLX4_CMD_MAP_ICM_AUX	 = 0xffc,
	MLX4_CMD_UNMAP_ICM_AUX	 = 0xffb,
	MLX4_CMD_SET_ICM_SIZE	 = 0xffd,
	MLX4_CMD_ACCESS_REG	 = 0x3b,
	MLX4_CMD_ALLOCATE_VPP	 = 0x80,
	MLX4_CMD_SET_VPORT_QOS	 = 0x81,

	/*master notify fw on finish for slave's flr*/
	MLX4_CMD_INFORM_FLR_DONE = 0x5b,
	MLX4_CMD_VIRT_PORT_MAP   = 0x5c,
	MLX4_CMD_GET_OP_REQ      = 0x59,

	/* TPT commands */
	MLX4_CMD_SW2HW_MPT	 = 0xd,
	MLX4_CMD_QUERY_MPT	 = 0xe,
	MLX4_CMD_HW2SW_MPT	 = 0xf,
	MLX4_CMD_READ_MTT	 = 0x10,
	MLX4_CMD_WRITE_MTT	 = 0x11,
	MLX4_CMD_SYNC_TPT	 = 0x2f,

	/* EQ commands */
	MLX4_CMD_MAP_EQ		 = 0x12,
	MLX4_CMD_SW2HW_EQ	 = 0x13,
	MLX4_CMD_HW2SW_EQ	 = 0x14,
	MLX4_CMD_QUERY_EQ	 = 0x15,

	/* CQ commands */
	MLX4_CMD_SW2HW_CQ	 = 0x16,
	MLX4_CMD_HW2SW_CQ	 = 0x17,
	MLX4_CMD_QUERY_CQ	 = 0x18,
	MLX4_CMD_MODIFY_CQ	 = 0x2c,

	/* SRQ commands */
	MLX4_CMD_SW2HW_SRQ	 = 0x35,
	MLX4_CMD_HW2SW_SRQ	 = 0x36,
	MLX4_CMD_QUERY_SRQ	 = 0x37,
	MLX4_CMD_ARM_SRQ	 = 0x40,

	/* QP/EE commands */
	MLX4_CMD_RST2INIT_QP	 = 0x19,
	MLX4_CMD_INIT2RTR_QP	 = 0x1a,
	MLX4_CMD_RTR2RTS_QP	 = 0x1b,
	MLX4_CMD_RTS2RTS_QP	 = 0x1c,
	MLX4_CMD_SQERR2RTS_QP	 = 0x1d,
	MLX4_CMD_2ERR_QP	 = 0x1e,
	MLX4_CMD_RTS2SQD_QP	 = 0x1f,
	MLX4_CMD_SQD2SQD_QP	 = 0x38,
	MLX4_CMD_SQD2RTS_QP	 = 0x20,
	MLX4_CMD_2RST_QP	 = 0x21,
	MLX4_CMD_QUERY_QP	 = 0x22,
	MLX4_CMD_INIT2INIT_QP	 = 0x2d,
	MLX4_CMD_SUSPEND_QP	 = 0x32,
	MLX4_CMD_UNSUSPEND_QP	 = 0x33,
	MLX4_CMD_UPDATE_QP	 = 0x61,
	/* special QP and management commands */
	MLX4_CMD_CONF_SPECIAL_QP = 0x23,
	MLX4_CMD_MAD_IFC	 = 0x24,
	MLX4_CMD_MAD_DEMUX	 = 0x203,

	/* multicast commands */
	MLX4_CMD_READ_MCG	 = 0x25,
	MLX4_CMD_WRITE_MCG	 = 0x26,
	MLX4_CMD_MGID_HASH	 = 0x27,

	/* miscellaneous commands */
	MLX4_CMD_DIAG_RPRT	 = 0x30,
	MLX4_CMD_NOP		 = 0x31,
	MLX4_CMD_CONFIG_DEV	 = 0x3a,
	MLX4_CMD_ACCESS_MEM	 = 0x2e,
	MLX4_CMD_SET_VEP	 = 0x52,

	/* Ethernet specific commands */
	MLX4_CMD_SET_VLAN_FLTR	 = 0x47,
	MLX4_CMD_SET_MCAST_FLTR	 = 0x48,
	MLX4_CMD_DUMP_ETH_STATS	 = 0x49,

	/* Communication channel commands */
	MLX4_CMD_ARM_COMM_CHANNEL = 0x57,
	MLX4_CMD_GEN_EQE	 = 0x58,

	/* virtual commands */
	MLX4_CMD_ALLOC_RES	 = 0xf00,
	MLX4_CMD_FREE_RES	 = 0xf01,
	MLX4_CMD_MCAST_ATTACH	 = 0xf05,
	MLX4_CMD_UCAST_ATTACH	 = 0xf06,
	MLX4_CMD_PROMISC         = 0xf08,
	MLX4_CMD_QUERY_FUNC_CAP  = 0xf0a,
	MLX4_CMD_QP_ATTACH	 = 0xf0b,

	/* debug commands */
	MLX4_CMD_QUERY_DEBUG_MSG = 0x2a,
	MLX4_CMD_SET_DEBUG_MSG	 = 0x2b,

	/* statistics commands */
	MLX4_CMD_QUERY_IF_STAT	 = 0X54,
	MLX4_CMD_SET_IF_STAT	 = 0X55,

	/* register/delete flow steering network rules */
	MLX4_QP_FLOW_STEERING_ATTACH = 0x65,
	MLX4_QP_FLOW_STEERING_DETACH = 0x66,
	MLX4_FLOW_STEERING_IB_UC_QP_RANGE = 0x64,

	/* Update and read QCN parameters */
	MLX4_CMD_CONGESTION_CTRL_OPCODE = 0x68,
};

enum {
	MLX4_CMD_TIME_CLASS_A	= 60000,
	MLX4_CMD_TIME_CLASS_B	= 60000,
	MLX4_CMD_TIME_CLASS_C	= 60000,
};

enum {
	/* virtual to physical port mapping opcode modifiers */
	MLX4_GET_PORT_VIRT2PHY = 0x0,
	MLX4_SET_PORT_VIRT2PHY = 0x1,
};

enum {
	MLX4_MAILBOX_SIZE	= 4096,
	MLX4_ACCESS_MEM_ALIGN	= 256,
};

enum {
	/* Set port opcode modifiers */
	MLX4_SET_PORT_IB_OPCODE		= 0x0,
	MLX4_SET_PORT_ETH_OPCODE	= 0x1,
	MLX4_SET_PORT_BEACON_OPCODE	= 0x4,
};

enum {
	/* Set port Ethernet input modifiers */
	MLX4_SET_PORT_GENERAL   = 0x0,
	MLX4_SET_PORT_RQP_CALC  = 0x1,
	MLX4_SET_PORT_MAC_TABLE = 0x2,
	MLX4_SET_PORT_VLAN_TABLE = 0x3,
	MLX4_SET_PORT_PRIO_MAP  = 0x4,
	MLX4_SET_PORT_GID_TABLE = 0x5,
	MLX4_SET_PORT_PRIO2TC	= 0x8,
	MLX4_SET_PORT_SCHEDULER = 0x9,
	MLX4_SET_PORT_VXLAN	= 0xB
};

enum {
	MLX4_CMD_MAD_DEMUX_CONFIG	= 0,
	MLX4_CMD_MAD_DEMUX_QUERY_STATE	= 1,
	MLX4_CMD_MAD_DEMUX_QUERY_RESTR	= 2, /* Query mad demux restrictions */
};

enum {
	MLX4_CMD_WRAPPED,
	MLX4_CMD_NATIVE
};

/*
 * MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP -
 * Receive checksum value is reported in CQE also for non TCP/UDP packets.
 *
 * MLX4_RX_CSUM_MODE_L4 -
 * L4_CSUM bit in CQE, which indicates whether or not L4 checksum
 * was validated correctly, is supported.
 *
 * MLX4_RX_CSUM_MODE_IP_OK_IP_NON_TCP_UDP -
 * IP_OK CQE's field is supported also for non TCP/UDP IP packets.
 *
 * MLX4_RX_CSUM_MODE_MULTI_VLAN -
 * Receive Checksum offload is supported for packets with more than 2 vlan headers.
 */
enum mlx4_rx_csum_mode {
	MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP		= 1UL << 0,
	MLX4_RX_CSUM_MODE_L4				= 1UL << 1,
	MLX4_RX_CSUM_MODE_IP_OK_IP_NON_TCP_UDP		= 1UL << 2,
	MLX4_RX_CSUM_MODE_MULTI_VLAN			= 1UL << 3
};

struct mlx4_config_dev_params {
	u16	vxlan_udp_dport;
	u8	rx_csum_flags_port_1;
	u8	rx_csum_flags_port_2;
};

enum mlx4_en_congestion_control_algorithm {
	MLX4_CTRL_ALGO_802_1_QAU_REACTION_POINT = 0,
};

enum mlx4_en_congestion_control_opmod {
	MLX4_CONGESTION_CONTROL_GET_PARAMS,
	MLX4_CONGESTION_CONTROL_GET_STATISTICS,
	MLX4_CONGESTION_CONTROL_SET_PARAMS = 4,
};

struct mlx4_dev;

struct mlx4_cmd_mailbox {
	void		       *buf;
	dma_addr_t		dma;
};

int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
	       int out_is_imm, u32 in_modifier, u8 op_modifier,
	       u16 op, unsigned long timeout, int native);

/* Invoke a command with no output parameter */
static inline int mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u32 in_modifier,
			   u8 op_modifier, u16 op, unsigned long timeout,
			   int native)
{
	return __mlx4_cmd(dev, in_param, NULL, 0, in_modifier,
			  op_modifier, op, timeout, native);
}

/* Invoke a command with an output mailbox */
static inline int mlx4_cmd_box(struct mlx4_dev *dev, u64 in_param, u64 out_param,
			       u32 in_modifier, u8 op_modifier, u16 op,
			       unsigned long timeout, int native)
{
	return __mlx4_cmd(dev, in_param, &out_param, 0, in_modifier,
			  op_modifier, op, timeout, native);
}

/*
 * Invoke a command with an immediate output parameter (and copy the
 * output into the caller's out_param pointer after the command
 * executes).
 */
static inline int mlx4_cmd_imm(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
			       u32 in_modifier, u8 op_modifier, u16 op,
			       unsigned long timeout, int native)
{
	return __mlx4_cmd(dev, in_param, out_param, 1, in_modifier,
			  op_modifier, op, timeout, native);
}

struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev);
void mlx4_free_cmd_mailbox(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox);

int mlx4_get_counter_stats(struct mlx4_dev *dev, int counter_index,
			   struct mlx4_counter *counter_stats, int reset);
int mlx4_get_vf_stats(struct mlx4_dev *dev, int port, int vf_idx,
		      struct ifla_vf_stats *vf_stats);
u32 mlx4_comm_get_version(void);
int mlx4_set_vf_mac(struct mlx4_dev *dev, int port, int vf, u64 mac);
int mlx4_set_vf_vlan(struct mlx4_dev *dev, int port, int vf, u16 vlan, u8 qos);
int mlx4_set_vf_rate(struct mlx4_dev *dev, int port, int vf, int min_tx_rate,
		     int max_tx_rate);
int mlx4_set_vf_spoofchk(struct mlx4_dev *dev, int port, int vf, bool setting);
int mlx4_get_vf_config(struct mlx4_dev *dev, int port, int vf, struct ifla_vf_info *ivf);
int mlx4_set_vf_link_state(struct mlx4_dev *dev, int port, int vf, int link_state);
int mlx4_config_dev_retrieval(struct mlx4_dev *dev,
			      struct mlx4_config_dev_params *params);
void mlx4_cmd_wake_completions(struct mlx4_dev *dev);
void mlx4_report_internal_err_comm_event(struct mlx4_dev *dev);
/*
 * mlx4_get_slave_default_vlan -
 * return true if VST ( default vlan)
 * if VST, will return vlan & qos (if not NULL)
 */
bool mlx4_get_slave_default_vlan(struct mlx4_dev *dev, int port, int slave,
				 u16 *vlan, u8 *qos);

#define MLX4_COMM_GET_IF_REV(cmd_chan_ver) (u8)((cmd_chan_ver) >> 8)
#define COMM_CHAN_EVENT_INTERNAL_ERR (1 << 17)

#endif /* MLX4_CMD_H */
upt acknowledge register. */ static inline u32 ack_bit(unsigned int irq) { return 1 << (irq - IRQ_EINT0); } /** * s3c24xx_spi_tryfiq - attempt to claim and setup FIQ for transfer * @hw: The hardware state. * * Claim the FIQ handler (only one can be active at any one time) and * then setup the correct transfer code for this transfer. * * This call updates all the necessary state information if successful, * so the caller does not need to do anything more than start the transfer * as normal, since the IRQ will have been re-routed to the FIQ handler. */ static void s3c24xx_spi_tryfiq(struct s3c24xx_spi *hw) { struct pt_regs regs; enum spi_fiq_mode mode; struct spi_fiq_code *code; int ret; if (!hw->fiq_claimed) { /* try and claim fiq if we haven't got it, and if not * then return and simply use another transfer method */ ret = claim_fiq(&hw->fiq_handler); if (ret) return; } if (hw->tx && !hw->rx) mode = FIQ_MODE_TX; else if (hw->rx && !hw->tx) mode = FIQ_MODE_RX; else mode = FIQ_MODE_TXRX; regs.uregs[fiq_rspi] = (long)hw->regs; regs.uregs[fiq_rrx] = (long)hw->rx; regs.uregs[fiq_rtx] = (long)hw->tx + 1; regs.uregs[fiq_rcount] = hw->len - 1; regs.uregs[fiq_rirq] = (long)S3C24XX_VA_IRQ; set_fiq_regs(&regs); if (hw->fiq_mode != mode) { u32 *ack_ptr; hw->fiq_mode = mode; switch (mode) { case FIQ_MODE_TX: code = &s3c24xx_spi_fiq_tx; break; case FIQ_MODE_RX: code = &s3c24xx_spi_fiq_rx; break; case FIQ_MODE_TXRX: code = &s3c24xx_spi_fiq_txrx; break; default: code = NULL; } BUG_ON(!code); ack_ptr = (u32 *)&code->data[code->ack_offset]; *ack_ptr = ack_bit(hw->irq); set_fiq_handler(&code->data, code->length); } s3c24xx_set_fiq(hw->irq, true); hw->fiq_mode = mode; hw->fiq_inuse = 1; } /** * s3c24xx_spi_fiqop - FIQ core code callback * @pw: Data registered with the handler * @release: Whether this is a release or a return. * * Called by the FIQ code when another module wants to use the FIQ, so * return whether we are currently using this or not and then update our * internal state. */ static int s3c24xx_spi_fiqop(void *pw, int release) { struct s3c24xx_spi *hw = pw; int ret = 0; if (release) { if (hw->fiq_inuse) ret = -EBUSY; /* note, we do not need to unroute the FIQ, as the FIQ * vector code de-routes it to signal the end of transfer */ hw->fiq_mode = FIQ_MODE_NONE; hw->fiq_claimed = 0; } else { hw->fiq_claimed = 1; } return ret; } /** * s3c24xx_spi_initfiq - setup the information for the FIQ core * @hw: The hardware state. * * Setup the fiq_handler block to pass to the FIQ core. */ static inline void s3c24xx_spi_initfiq(struct s3c24xx_spi *hw) { hw->fiq_handler.dev_id = hw; hw->fiq_handler.name = dev_name(hw->dev); hw->fiq_handler.fiq_op = s3c24xx_spi_fiqop; } /** * s3c24xx_spi_usefiq - return if we should be using FIQ. * @hw: The hardware state. * * Return true if the platform data specifies whether this channel is * allowed to use the FIQ. */ static inline bool s3c24xx_spi_usefiq(struct s3c24xx_spi *hw) { return hw->pdata->use_fiq; } /** * s3c24xx_spi_usingfiq - return if channel is using FIQ * @spi: The hardware state. * * Return whether the channel is currently using the FIQ (separate from * whether the FIQ is claimed). */ static inline bool s3c24xx_spi_usingfiq(struct s3c24xx_spi *spi) { return spi->fiq_inuse; } #else static inline void s3c24xx_spi_initfiq(struct s3c24xx_spi *s) { } static inline void s3c24xx_spi_tryfiq(struct s3c24xx_spi *s) { } static inline bool s3c24xx_spi_usefiq(struct s3c24xx_spi *s) { return false; } static inline bool s3c24xx_spi_usingfiq(struct s3c24xx_spi *s) { return false; } #endif /* CONFIG_SPI_S3C24XX_FIQ */ static int s3c24xx_spi_txrx(struct spi_device *spi, struct spi_transfer *t) { struct s3c24xx_spi *hw = to_hw(spi); hw->tx = t->tx_buf; hw->rx = t->rx_buf; hw->len = t->len; hw->count = 0; init_completion(&hw->done); hw->fiq_inuse = 0; if (s3c24xx_spi_usefiq(hw) && t->len >= 3) s3c24xx_spi_tryfiq(hw); /* send the first byte */ writeb(hw_txbyte(hw, 0), hw->regs + S3C2410_SPTDAT); wait_for_completion(&hw->done); return hw->count; } static irqreturn_t s3c24xx_spi_irq(int irq, void *dev) { struct s3c24xx_spi *hw = dev; unsigned int spsta = readb(hw->regs + S3C2410_SPSTA); unsigned int count = hw->count; if (spsta & S3C2410_SPSTA_DCOL) { dev_dbg(hw->dev, "data-collision\n"); complete(&hw->done); goto irq_done; } if (!(spsta & S3C2410_SPSTA_READY)) { dev_dbg(hw->dev, "spi not ready for tx?\n"); complete(&hw->done); goto irq_done; } if (!s3c24xx_spi_usingfiq(hw)) { hw->count++; if (hw->rx) hw->rx[count] = readb(hw->regs + S3C2410_SPRDAT); count++; if (count < hw->len) writeb(hw_txbyte(hw, count), hw->regs + S3C2410_SPTDAT); else complete(&hw->done); } else { hw->count = hw->len; hw->fiq_inuse = 0; if (hw->rx) hw->rx[hw->len-1] = readb(hw->regs + S3C2410_SPRDAT); complete(&hw->done); } irq_done: return IRQ_HANDLED; } static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw) { /* for the moment, permanently enable the clock */ clk_enable(hw->clk); /* program defaults into the registers */ writeb(0xff, hw->regs + S3C2410_SPPRE); writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN); writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON); if (hw->pdata) { if (hw->set_cs == s3c24xx_spi_gpiocs) gpio_direction_output(hw->pdata->pin_cs, 1); if (hw->pdata->gpio_setup) hw->pdata->gpio_setup(hw->pdata, 1); } } static int s3c24xx_spi_probe(struct platform_device *pdev) { struct s3c2410_spi_info *pdata; struct s3c24xx_spi *hw; struct spi_master *master; struct resource *res; int err = 0; master = spi_alloc_master(&pdev->dev, sizeof(struct s3c24xx_spi)); if (master == NULL) { dev_err(&pdev->dev, "No memory for spi_master\n"); return -ENOMEM; } hw = spi_master_get_devdata(master); hw->master = master; hw->pdata = pdata = dev_get_platdata(&pdev->dev); hw->dev = &pdev->dev; if (pdata == NULL) { dev_err(&pdev->dev, "No platform data supplied\n"); err = -ENOENT; goto err_no_pdata; } platform_set_drvdata(pdev, hw); init_completion(&hw->done); /* initialise fiq handler */ s3c24xx_spi_initfiq(hw); /* setup the master state. */ /* the spi->mode bits understood by this driver: */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->num_chipselect = hw->pdata->num_cs; master->bus_num = pdata->bus_num; master->bits_per_word_mask = SPI_BPW_MASK(8); /* setup the state for the bitbang driver */ hw->bitbang.master = hw->master; hw->bitbang.setup_transfer = s3c24xx_spi_setupxfer; hw->bitbang.chipselect = s3c24xx_spi_chipsel; hw->bitbang.txrx_bufs = s3c24xx_spi_txrx; hw->master->setup = s3c24xx_spi_setup; dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang); /* find and map our resources */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hw->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hw->regs)) { err = PTR_ERR(hw->regs); goto err_no_pdata; } hw->irq = platform_get_irq(pdev, 0); if (hw->irq < 0) { dev_err(&pdev->dev, "No IRQ specified\n"); err = -ENOENT; goto err_no_pdata; } err = devm_request_irq(&pdev->dev, hw->irq, s3c24xx_spi_irq, 0, pdev->name, hw); if (err) { dev_err(&pdev->dev, "Cannot claim IRQ\n"); goto err_no_pdata; } hw->clk = devm_clk_get(&pdev->dev, "spi"); if (IS_ERR(hw->clk)) { dev_err(&pdev->dev, "No clock for device\n"); err = PTR_ERR(hw->clk); goto err_no_pdata; } /* setup any gpio we can */ if (!pdata->set_cs) { if (pdata->pin_cs < 0) { dev_err(&pdev->dev, "No chipselect pin\n"); err = -EINVAL; goto err_register; } err = devm_gpio_request(&pdev->dev, pdata->pin_cs, dev_name(&pdev->dev)); if (err) { dev_err(&pdev->dev, "Failed to get gpio for cs\n"); goto err_register; } hw->set_cs = s3c24xx_spi_gpiocs; gpio_direction_output(pdata->pin_cs, 1); } else hw->set_cs = pdata->set_cs; s3c24xx_spi_initialsetup(hw); /* register our spi controller */ err = spi_bitbang_start(&hw->bitbang); if (err) { dev_err(&pdev->dev, "Failed to register SPI master\n"); goto err_register; } return 0; err_register: clk_disable(hw->clk); err_no_pdata: spi_master_put(hw->master); return err; } static int s3c24xx_spi_remove(struct platform_device *dev) { struct s3c24xx_spi *hw = platform_get_drvdata(dev); spi_bitbang_stop(&hw->bitbang); clk_disable(hw->clk); spi_master_put(hw->master); return 0; } #ifdef CONFIG_PM static int s3c24xx_spi_suspend(struct device *dev) { struct s3c24xx_spi *hw = dev_get_drvdata(dev); int ret; ret = spi_master_suspend(hw->master); if (ret) return ret; if (hw->pdata && hw->pdata->gpio_setup) hw->pdata->gpio_setup(hw->pdata, 0); clk_disable(hw->clk); return 0; } static int s3c24xx_spi_resume(struct device *dev) { struct s3c24xx_spi *hw = dev_get_drvdata(dev); s3c24xx_spi_initialsetup(hw); return spi_master_resume(hw->master); } static const struct dev_pm_ops s3c24xx_spi_pmops = { .suspend = s3c24xx_spi_suspend, .resume = s3c24xx_spi_resume, }; #define S3C24XX_SPI_PMOPS &s3c24xx_spi_pmops #else #define S3C24XX_SPI_PMOPS NULL #endif /* CONFIG_PM */ MODULE_ALIAS("platform:s3c2410-spi"); static struct platform_driver s3c24xx_spi_driver = { .probe = s3c24xx_spi_probe, .remove = s3c24xx_spi_remove, .driver = { .name = "s3c2410-spi", .pm = S3C24XX_SPI_PMOPS, }, }; module_platform_driver(s3c24xx_spi_driver); MODULE_DESCRIPTION("S3C24XX SPI Driver"); MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); MODULE_LICENSE("GPL");