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linux-next/drivers/fpga/socfpga.c
Moritz Fischer e2d8680741 fpga: socfpga: Fix check of return value of devm_request_irq 
The return value should be checked for non-zero, instead
of checking it being IS_ERR_VALUE().

Acked-by: Alan Tull <atull@opensource.altera.com>
Reviewed-by: Josh Cartwright <joshc@eso.teric.us>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-29 15:20:25 -07:00

617 lines
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/*
* FPGA Manager Driver for Altera SOCFPGA
*
* Copyright (C) 2013-2015 Altera Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/fpga/fpga-mgr.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/pm.h>
/* Register offsets */
#define SOCFPGA_FPGMGR_STAT_OFST 0x0
#define SOCFPGA_FPGMGR_CTL_OFST 0x4
#define SOCFPGA_FPGMGR_DCLKCNT_OFST 0x8
#define SOCFPGA_FPGMGR_DCLKSTAT_OFST 0xc
#define SOCFPGA_FPGMGR_GPIO_INTEN_OFST 0x830
#define SOCFPGA_FPGMGR_GPIO_INTMSK_OFST 0x834
#define SOCFPGA_FPGMGR_GPIO_INTTYPE_LEVEL_OFST 0x838
#define SOCFPGA_FPGMGR_GPIO_INT_POL_OFST 0x83c
#define SOCFPGA_FPGMGR_GPIO_INTSTAT_OFST 0x840
#define SOCFPGA_FPGMGR_GPIO_RAW_INTSTAT_OFST 0x844
#define SOCFPGA_FPGMGR_GPIO_PORTA_EOI_OFST 0x84c
#define SOCFPGA_FPGMGR_GPIO_EXT_PORTA_OFST 0x850
/* Register bit defines */
/* SOCFPGA_FPGMGR_STAT register mode field values */
#define SOCFPGA_FPGMGR_STAT_POWER_UP 0x0 /*ramping*/
#define SOCFPGA_FPGMGR_STAT_RESET 0x1
#define SOCFPGA_FPGMGR_STAT_CFG 0x2
#define SOCFPGA_FPGMGR_STAT_INIT 0x3
#define SOCFPGA_FPGMGR_STAT_USER_MODE 0x4
#define SOCFPGA_FPGMGR_STAT_UNKNOWN 0x5
#define SOCFPGA_FPGMGR_STAT_STATE_MASK 0x7
/* This is a flag value that doesn't really happen in this register field */
#define SOCFPGA_FPGMGR_STAT_POWER_OFF 0x0
#define MSEL_PP16_FAST_NOAES_NODC 0x0
#define MSEL_PP16_FAST_AES_NODC 0x1
#define MSEL_PP16_FAST_AESOPT_DC 0x2
#define MSEL_PP16_SLOW_NOAES_NODC 0x4
#define MSEL_PP16_SLOW_AES_NODC 0x5
#define MSEL_PP16_SLOW_AESOPT_DC 0x6
#define MSEL_PP32_FAST_NOAES_NODC 0x8
#define MSEL_PP32_FAST_AES_NODC 0x9
#define MSEL_PP32_FAST_AESOPT_DC 0xa
#define MSEL_PP32_SLOW_NOAES_NODC 0xc
#define MSEL_PP32_SLOW_AES_NODC 0xd
#define MSEL_PP32_SLOW_AESOPT_DC 0xe
#define SOCFPGA_FPGMGR_STAT_MSEL_MASK 0x000000f8
#define SOCFPGA_FPGMGR_STAT_MSEL_SHIFT 3
/* SOCFPGA_FPGMGR_CTL register */
#define SOCFPGA_FPGMGR_CTL_EN 0x00000001
#define SOCFPGA_FPGMGR_CTL_NCE 0x00000002
#define SOCFPGA_FPGMGR_CTL_NCFGPULL 0x00000004
#define CDRATIO_X1 0x00000000
#define CDRATIO_X2 0x00000040
#define CDRATIO_X4 0x00000080
#define CDRATIO_X8 0x000000c0
#define SOCFPGA_FPGMGR_CTL_CDRATIO_MASK 0x000000c0
#define SOCFPGA_FPGMGR_CTL_AXICFGEN 0x00000100
#define CFGWDTH_16 0x00000000
#define CFGWDTH_32 0x00000200
#define SOCFPGA_FPGMGR_CTL_CFGWDTH_MASK 0x00000200
/* SOCFPGA_FPGMGR_DCLKSTAT register */
#define SOCFPGA_FPGMGR_DCLKSTAT_DCNTDONE_E_DONE 0x1
/* SOCFPGA_FPGMGR_GPIO_* registers share the same bit positions */
#define SOCFPGA_FPGMGR_MON_NSTATUS 0x0001
#define SOCFPGA_FPGMGR_MON_CONF_DONE 0x0002
#define SOCFPGA_FPGMGR_MON_INIT_DONE 0x0004
#define SOCFPGA_FPGMGR_MON_CRC_ERROR 0x0008
#define SOCFPGA_FPGMGR_MON_CVP_CONF_DONE 0x0010
#define SOCFPGA_FPGMGR_MON_PR_READY 0x0020
#define SOCFPGA_FPGMGR_MON_PR_ERROR 0x0040
#define SOCFPGA_FPGMGR_MON_PR_DONE 0x0080
#define SOCFPGA_FPGMGR_MON_NCONFIG_PIN 0x0100
#define SOCFPGA_FPGMGR_MON_NSTATUS_PIN 0x0200
#define SOCFPGA_FPGMGR_MON_CONF_DONE_PIN 0x0400
#define SOCFPGA_FPGMGR_MON_FPGA_POWER_ON 0x0800
#define SOCFPGA_FPGMGR_MON_STATUS_MASK 0x0fff
#define SOCFPGA_FPGMGR_NUM_SUPPLIES 3
#define SOCFPGA_RESUME_TIMEOUT 3
/* In power-up order. Reverse for power-down. */
static const char *supply_names[SOCFPGA_FPGMGR_NUM_SUPPLIES] __maybe_unused = {
"FPGA-1.5V",
"FPGA-1.1V",
"FPGA-2.5V",
};
struct socfpga_fpga_priv {
void __iomem *fpga_base_addr;
void __iomem *fpga_data_addr;
struct completion status_complete;
int irq;
};
struct cfgmgr_mode {
/* Values to set in the CTRL register */
u32 ctrl;
/* flag that this table entry is a valid mode */
bool valid;
};
/* For SOCFPGA_FPGMGR_STAT_MSEL field */
static struct cfgmgr_mode cfgmgr_modes[] = {
[MSEL_PP16_FAST_NOAES_NODC] = { CFGWDTH_16 | CDRATIO_X1, 1 },
[MSEL_PP16_FAST_AES_NODC] = { CFGWDTH_16 | CDRATIO_X2, 1 },
[MSEL_PP16_FAST_AESOPT_DC] = { CFGWDTH_16 | CDRATIO_X4, 1 },
[MSEL_PP16_SLOW_NOAES_NODC] = { CFGWDTH_16 | CDRATIO_X1, 1 },
[MSEL_PP16_SLOW_AES_NODC] = { CFGWDTH_16 | CDRATIO_X2, 1 },
[MSEL_PP16_SLOW_AESOPT_DC] = { CFGWDTH_16 | CDRATIO_X4, 1 },
[MSEL_PP32_FAST_NOAES_NODC] = { CFGWDTH_32 | CDRATIO_X1, 1 },
[MSEL_PP32_FAST_AES_NODC] = { CFGWDTH_32 | CDRATIO_X4, 1 },
[MSEL_PP32_FAST_AESOPT_DC] = { CFGWDTH_32 | CDRATIO_X8, 1 },
[MSEL_PP32_SLOW_NOAES_NODC] = { CFGWDTH_32 | CDRATIO_X1, 1 },
[MSEL_PP32_SLOW_AES_NODC] = { CFGWDTH_32 | CDRATIO_X4, 1 },
[MSEL_PP32_SLOW_AESOPT_DC] = { CFGWDTH_32 | CDRATIO_X8, 1 },
};
static u32 socfpga_fpga_readl(struct socfpga_fpga_priv *priv, u32 reg_offset)
{
return readl(priv->fpga_base_addr + reg_offset);
}
static void socfpga_fpga_writel(struct socfpga_fpga_priv *priv, u32 reg_offset,
u32 value)
{
writel(value, priv->fpga_base_addr + reg_offset);
}
static u32 socfpga_fpga_raw_readl(struct socfpga_fpga_priv *priv,
u32 reg_offset)
{
return __raw_readl(priv->fpga_base_addr + reg_offset);
}
static void socfpga_fpga_raw_writel(struct socfpga_fpga_priv *priv,
u32 reg_offset, u32 value)
{
__raw_writel(value, priv->fpga_base_addr + reg_offset);
}
static void socfpga_fpga_data_writel(struct socfpga_fpga_priv *priv, u32 value)
{
writel(value, priv->fpga_data_addr);
}
static inline void socfpga_fpga_set_bitsl(struct socfpga_fpga_priv *priv,
u32 offset, u32 bits)
{
u32 val;
val = socfpga_fpga_readl(priv, offset);
val |= bits;
socfpga_fpga_writel(priv, offset, val);
}
static inline void socfpga_fpga_clr_bitsl(struct socfpga_fpga_priv *priv,
u32 offset, u32 bits)
{
u32 val;
val = socfpga_fpga_readl(priv, offset);
val &= ~bits;
socfpga_fpga_writel(priv, offset, val);
}
static u32 socfpga_fpga_mon_status_get(struct socfpga_fpga_priv *priv)
{
return socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_GPIO_EXT_PORTA_OFST) &
SOCFPGA_FPGMGR_MON_STATUS_MASK;
}
static u32 socfpga_fpga_state_get(struct socfpga_fpga_priv *priv)
{
u32 status = socfpga_fpga_mon_status_get(priv);
if ((status & SOCFPGA_FPGMGR_MON_FPGA_POWER_ON) == 0)
return SOCFPGA_FPGMGR_STAT_POWER_OFF;
return socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_STAT_OFST) &
SOCFPGA_FPGMGR_STAT_STATE_MASK;
}
static void socfpga_fpga_clear_done_status(struct socfpga_fpga_priv *priv)
{
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_DCLKSTAT_OFST,
SOCFPGA_FPGMGR_DCLKSTAT_DCNTDONE_E_DONE);
}
/*
* Set the DCLKCNT, wait for DCLKSTAT to report the count completed, and clear
* the complete status.
*/
static int socfpga_fpga_dclk_set_and_wait_clear(struct socfpga_fpga_priv *priv,
u32 count)
{
int timeout = 2;
u32 done;
/* Clear any existing DONE status. */
if (socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_DCLKSTAT_OFST))
socfpga_fpga_clear_done_status(priv);
/* Issue the DCLK count. */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_DCLKCNT_OFST, count);
/* Poll DCLKSTAT to see if it completed in the timeout period. */
do {
done = socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_DCLKSTAT_OFST);
if (done == SOCFPGA_FPGMGR_DCLKSTAT_DCNTDONE_E_DONE) {
socfpga_fpga_clear_done_status(priv);
return 0;
}
udelay(1);
} while (timeout--);
return -ETIMEDOUT;
}
static int socfpga_fpga_wait_for_state(struct socfpga_fpga_priv *priv,
u32 state)
{
int timeout = 2;
/*
* HW doesn't support an interrupt for changes in state, so poll to see
* if it matches the requested state within the timeout period.
*/
do {
if ((socfpga_fpga_state_get(priv) & state) != 0)
return 0;
msleep(20);
} while (timeout--);
return -ETIMEDOUT;
}
static void socfpga_fpga_enable_irqs(struct socfpga_fpga_priv *priv, u32 irqs)
{
/* set irqs to level sensitive */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_INTTYPE_LEVEL_OFST, 0);
/* set interrupt polarity */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_INT_POL_OFST, irqs);
/* clear irqs */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_PORTA_EOI_OFST, irqs);
/* unmask interrupts */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_INTMSK_OFST, 0);
/* enable interrupts */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_INTEN_OFST, irqs);
}
static void socfpga_fpga_disable_irqs(struct socfpga_fpga_priv *priv)
{
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_INTEN_OFST, 0);
}
static irqreturn_t socfpga_fpga_isr(int irq, void *dev_id)
{
struct socfpga_fpga_priv *priv = dev_id;
u32 irqs, st;
bool conf_done, nstatus;
/* clear irqs */
irqs = socfpga_fpga_raw_readl(priv, SOCFPGA_FPGMGR_GPIO_INTSTAT_OFST);
socfpga_fpga_raw_writel(priv, SOCFPGA_FPGMGR_GPIO_PORTA_EOI_OFST, irqs);
st = socfpga_fpga_raw_readl(priv, SOCFPGA_FPGMGR_GPIO_EXT_PORTA_OFST);
conf_done = (st & SOCFPGA_FPGMGR_MON_CONF_DONE) != 0;
nstatus = (st & SOCFPGA_FPGMGR_MON_NSTATUS) != 0;
/* success */
if (conf_done && nstatus) {
/* disable irqs */
socfpga_fpga_raw_writel(priv,
SOCFPGA_FPGMGR_GPIO_INTEN_OFST, 0);
complete(&priv->status_complete);
}
return IRQ_HANDLED;
}
static int socfpga_fpga_wait_for_config_done(struct socfpga_fpga_priv *priv)
{
int timeout, ret = 0;
socfpga_fpga_disable_irqs(priv);
init_completion(&priv->status_complete);
socfpga_fpga_enable_irqs(priv, SOCFPGA_FPGMGR_MON_CONF_DONE);
timeout = wait_for_completion_interruptible_timeout(
&priv->status_complete,
msecs_to_jiffies(10));
if (timeout == 0)
ret = -ETIMEDOUT;
socfpga_fpga_disable_irqs(priv);
return ret;
}
static int socfpga_fpga_cfg_mode_get(struct socfpga_fpga_priv *priv)
{
u32 msel;
msel = socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_STAT_OFST);
msel &= SOCFPGA_FPGMGR_STAT_MSEL_MASK;
msel >>= SOCFPGA_FPGMGR_STAT_MSEL_SHIFT;
/* Check that this MSEL setting is supported */
if ((msel >= ARRAY_SIZE(cfgmgr_modes)) || !cfgmgr_modes[msel].valid)
return -EINVAL;
return msel;
}
static int socfpga_fpga_cfg_mode_set(struct socfpga_fpga_priv *priv)
{
u32 ctrl_reg;
int mode;
/* get value from MSEL pins */
mode = socfpga_fpga_cfg_mode_get(priv);
if (mode < 0)
return mode;
/* Adjust CTRL for the CDRATIO */
ctrl_reg = socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_CTL_OFST);
ctrl_reg &= ~SOCFPGA_FPGMGR_CTL_CDRATIO_MASK;
ctrl_reg &= ~SOCFPGA_FPGMGR_CTL_CFGWDTH_MASK;
ctrl_reg |= cfgmgr_modes[mode].ctrl;
/* Set NCE to 0. */
ctrl_reg &= ~SOCFPGA_FPGMGR_CTL_NCE;
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_CTL_OFST, ctrl_reg);
return 0;
}
static int socfpga_fpga_reset(struct fpga_manager *mgr)
{
struct socfpga_fpga_priv *priv = mgr->priv;
u32 ctrl_reg, status;
int ret;
/*
* Step 1:
* - Set CTRL.CFGWDTH, CTRL.CDRATIO to match cfg mode
* - Set CTRL.NCE to 0
*/
ret = socfpga_fpga_cfg_mode_set(priv);
if (ret)
return ret;
/* Step 2: Set CTRL.EN to 1 */
socfpga_fpga_set_bitsl(priv, SOCFPGA_FPGMGR_CTL_OFST,
SOCFPGA_FPGMGR_CTL_EN);
/* Step 3: Set CTRL.NCONFIGPULL to 1 to put FPGA in reset */
ctrl_reg = socfpga_fpga_readl(priv, SOCFPGA_FPGMGR_CTL_OFST);
ctrl_reg |= SOCFPGA_FPGMGR_CTL_NCFGPULL;
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_CTL_OFST, ctrl_reg);
/* Step 4: Wait for STATUS.MODE to report FPGA is in reset phase */
status = socfpga_fpga_wait_for_state(priv, SOCFPGA_FPGMGR_STAT_RESET);
/* Step 5: Set CONTROL.NCONFIGPULL to 0 to release FPGA from reset */
ctrl_reg &= ~SOCFPGA_FPGMGR_CTL_NCFGPULL;
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_CTL_OFST, ctrl_reg);
/* Timeout waiting for reset */
if (status)
return -ETIMEDOUT;
return 0;
}
/*
* Prepare the FPGA to receive the configuration data.
*/
static int socfpga_fpga_ops_configure_init(struct fpga_manager *mgr, u32 flags,
const char *buf, size_t count)
{
struct socfpga_fpga_priv *priv = mgr->priv;
int ret;
if (flags & FPGA_MGR_PARTIAL_RECONFIG) {
dev_err(&mgr->dev, "Partial reconfiguration not supported.\n");
return -EINVAL;
}
/* Steps 1 - 5: Reset the FPGA */
ret = socfpga_fpga_reset(mgr);
if (ret)
return ret;
/* Step 6: Wait for FPGA to enter configuration phase */
if (socfpga_fpga_wait_for_state(priv, SOCFPGA_FPGMGR_STAT_CFG))
return -ETIMEDOUT;
/* Step 7: Clear nSTATUS interrupt */
socfpga_fpga_writel(priv, SOCFPGA_FPGMGR_GPIO_PORTA_EOI_OFST,
SOCFPGA_FPGMGR_MON_NSTATUS);
/* Step 8: Set CTRL.AXICFGEN to 1 to enable transfer of config data */
socfpga_fpga_set_bitsl(priv, SOCFPGA_FPGMGR_CTL_OFST,
SOCFPGA_FPGMGR_CTL_AXICFGEN);
return 0;
}
/*
* Step 9: write data to the FPGA data register
*/
static int socfpga_fpga_ops_configure_write(struct fpga_manager *mgr,
const char *buf, size_t count)
{
struct socfpga_fpga_priv *priv = mgr->priv;
u32 *buffer_32 = (u32 *)buf;
size_t i = 0;
if (count <= 0)
return -EINVAL;
/* Write out the complete 32-bit chunks. */
while (count >= sizeof(u32)) {
socfpga_fpga_data_writel(priv, buffer_32[i++]);
count -= sizeof(u32);
}
/* Write out remaining non 32-bit chunks. */
switch (count) {
case 3:
socfpga_fpga_data_writel(priv, buffer_32[i++] & 0x00ffffff);
break;
case 2:
socfpga_fpga_data_writel(priv, buffer_32[i++] & 0x0000ffff);
break;
case 1:
socfpga_fpga_data_writel(priv, buffer_32[i++] & 0x000000ff);
break;
case 0:
break;
default:
/* This will never happen. */
return -EFAULT;
}
return 0;
}
static int socfpga_fpga_ops_configure_complete(struct fpga_manager *mgr,
u32 flags)
{
struct socfpga_fpga_priv *priv = mgr->priv;
u32 status;
/*
* Step 10:
* - Observe CONF_DONE and nSTATUS (active low)
* - if CONF_DONE = 1 and nSTATUS = 1, configuration was successful
* - if CONF_DONE = 0 and nSTATUS = 0, configuration failed
*/
status = socfpga_fpga_wait_for_config_done(priv);
if (status)
return status;
/* Step 11: Clear CTRL.AXICFGEN to disable transfer of config data */
socfpga_fpga_clr_bitsl(priv, SOCFPGA_FPGMGR_CTL_OFST,
SOCFPGA_FPGMGR_CTL_AXICFGEN);
/*
* Step 12:
* - Write 4 to DCLKCNT
* - Wait for STATUS.DCNTDONE = 1
* - Clear W1C bit in STATUS.DCNTDONE
*/
if (socfpga_fpga_dclk_set_and_wait_clear(priv, 4))
return -ETIMEDOUT;
/* Step 13: Wait for STATUS.MODE to report USER MODE */
if (socfpga_fpga_wait_for_state(priv, SOCFPGA_FPGMGR_STAT_USER_MODE))
return -ETIMEDOUT;
/* Step 14: Set CTRL.EN to 0 */
socfpga_fpga_clr_bitsl(priv, SOCFPGA_FPGMGR_CTL_OFST,
SOCFPGA_FPGMGR_CTL_EN);
return 0;
}
/* Translate state register values to FPGA framework state */
static const enum fpga_mgr_states socfpga_state_to_framework_state[] = {
[SOCFPGA_FPGMGR_STAT_POWER_OFF] = FPGA_MGR_STATE_POWER_OFF,
[SOCFPGA_FPGMGR_STAT_RESET] = FPGA_MGR_STATE_RESET,
[SOCFPGA_FPGMGR_STAT_CFG] = FPGA_MGR_STATE_WRITE_INIT,
[SOCFPGA_FPGMGR_STAT_INIT] = FPGA_MGR_STATE_WRITE_INIT,
[SOCFPGA_FPGMGR_STAT_USER_MODE] = FPGA_MGR_STATE_OPERATING,
[SOCFPGA_FPGMGR_STAT_UNKNOWN] = FPGA_MGR_STATE_UNKNOWN,
};
static enum fpga_mgr_states socfpga_fpga_ops_state(struct fpga_manager *mgr)
{
struct socfpga_fpga_priv *priv = mgr->priv;
enum fpga_mgr_states ret;
u32 state;
state = socfpga_fpga_state_get(priv);
if (state < ARRAY_SIZE(socfpga_state_to_framework_state))
ret = socfpga_state_to_framework_state[state];
else
ret = FPGA_MGR_STATE_UNKNOWN;
return ret;
}
static const struct fpga_manager_ops socfpga_fpga_ops = {
.state = socfpga_fpga_ops_state,
.write_init = socfpga_fpga_ops_configure_init,
.write = socfpga_fpga_ops_configure_write,
.write_complete = socfpga_fpga_ops_configure_complete,
};
static int socfpga_fpga_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct socfpga_fpga_priv *priv;
struct resource *res;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->fpga_base_addr = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->fpga_base_addr))
return PTR_ERR(priv->fpga_base_addr);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
priv->fpga_data_addr = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->fpga_data_addr))
return PTR_ERR(priv->fpga_data_addr);
priv->irq = platform_get_irq(pdev, 0);
if (priv->irq < 0)
return priv->irq;
ret = devm_request_irq(dev, priv->irq, socfpga_fpga_isr, 0,
dev_name(dev), priv);
if (ret)
return ret;
return fpga_mgr_register(dev, "Altera SOCFPGA FPGA Manager",
&socfpga_fpga_ops, priv);
}
static int socfpga_fpga_remove(struct platform_device *pdev)
{
fpga_mgr_unregister(&pdev->dev);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id socfpga_fpga_of_match[] = {
{ .compatible = "altr,socfpga-fpga-mgr", },
{},
};
MODULE_DEVICE_TABLE(of, socfpga_fpga_of_match);
#endif
static struct platform_driver socfpga_fpga_driver = {
.probe = socfpga_fpga_probe,
.remove = socfpga_fpga_remove,
.driver = {
.name = "socfpga_fpga_manager",
.of_match_table = of_match_ptr(socfpga_fpga_of_match),
},
};
module_platform_driver(socfpga_fpga_driver);
MODULE_AUTHOR("Alan Tull <atull@opensource.altera.com>");
MODULE_DESCRIPTION("Altera SOCFPGA FPGA Manager");
MODULE_LICENSE("GPL v2");
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