linux/drivers/bcma/driver_gpio.c
Jakub Kicinski 196dd92a00 wireless-next patches for v6.2
First set of patches v6.2. mac80211 refactoring continues for Wi-Fi 7.
 All mac80211 driver are now converted to use internal TX queues, this
 might cause some regressions so we wanted to do this early in the
 cycle.
 
 Note: wireless tree was merged[1] to wireless-next to avoid some
 conflicts with mac80211 patches between the trees. Unfortunately there
 are still two smaller conflicts in net/mac80211/util.c which Stephen
 also reported[2]. In the first conflict initialise scratch_len to
 "params->scratch_len ?: 3 * params->len" (note number 3, not 2!) and
 in the second conflict take the version which uses elems->scratch_pos.
 
 Git diff output should like this:
 
 --- a/net/mac80211/util.c
 +++ b/net/mac80211/util.c
 @@@ -1506,7 -1648,7 +1650,7 @@@ ieee802_11_parse_elems_full(struct ieee
         const struct element *non_inherit = NULL;
         u8 *nontransmitted_profile;
         int nontransmitted_profile_len = 0;
 -       size_t scratch_len = params->len;
  -      size_t scratch_len = params->scratch_len ?: 2 * params->len;
 ++      size_t scratch_len = params->scratch_len ?: 3 * params->len;
 
         elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC);
         if (!elems)
 
 [1] https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git/commit/?id=dfd2d876b3fda1790bc0239ba4c6967e25d16e91
 [2] https://lore.kernel.org/all/20221020032340.5cf101c0@canb.auug.org.au/
 
 Major changes:
 
 mac80211
 
 * preparation for Wi-Fi 7 Multi-Link Operation (MLO) continues
 
 * add API to show the link STAs in debugfs
 
 * all mac80211 drivers are now using mac80211 internal TX queues (iTXQs)
 
 rtw89
 
 * support 8852BE
 
 rtl8xxxu
 
 * support RTL8188FU
 
 brmfmac
 
 * support two station interfaces concurrently
 
 bcma
 
 * support SPROM rev 11
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Kalle Valo says:

====================
pull-request: wireless-next-2022-10-28

First set of patches v6.2. mac80211 refactoring continues for Wi-Fi 7.
All mac80211 driver are now converted to use internal TX queues, this
might cause some regressions so we wanted to do this early in the
cycle.

Note: wireless tree was merged[1] to wireless-next to avoid some
conflicts with mac80211 patches between the trees. Unfortunately there
are still two smaller conflicts in net/mac80211/util.c which Stephen
also reported[2]. In the first conflict initialise scratch_len to
"params->scratch_len ?: 3 * params->len" (note number 3, not 2!) and
in the second conflict take the version which uses elems->scratch_pos.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git/commit/?id=dfd2d876b3fda1790bc0239ba4c6967e25d16e91
[2] https://lore.kernel.org/all/20221020032340.5cf101c0@canb.auug.org.au/

mac80211
 - preparation for Wi-Fi 7 Multi-Link Operation (MLO) continues
 - add API to show the link STAs in debugfs
 - all mac80211 drivers are now using mac80211 internal TX queues (iTXQs)

rtw89
 - support 8852BE

rtl8xxxu
 - support RTL8188FU

brmfmac
 - support two station interfaces concurrently

bcma
 - support SPROM rev 11
====================

Link: https://lore.kernel.org/r/20221028132943.304ECC433B5@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-10-28 18:31:40 -07:00

237 lines
5.7 KiB
C

/*
* Broadcom specific AMBA
* GPIO driver
*
* Copyright 2011, Broadcom Corporation
* Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/export.h>
#include <linux/property.h>
#include <linux/bcma/bcma.h>
#include "bcma_private.h"
#define BCMA_GPIO_MAX_PINS 32
static int bcma_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
return !!bcma_chipco_gpio_in(cc, 1 << gpio);
}
static void bcma_gpio_set_value(struct gpio_chip *chip, unsigned gpio,
int value)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
}
static int bcma_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
bcma_chipco_gpio_outen(cc, 1 << gpio, 0);
return 0;
}
static int bcma_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
int value)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
bcma_chipco_gpio_outen(cc, 1 << gpio, 1 << gpio);
bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
return 0;
}
static int bcma_gpio_request(struct gpio_chip *chip, unsigned gpio)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
bcma_chipco_gpio_control(cc, 1 << gpio, 0);
/* clear pulldown */
bcma_chipco_gpio_pulldown(cc, 1 << gpio, 0);
/* Set pullup */
bcma_chipco_gpio_pullup(cc, 1 << gpio, 1 << gpio);
return 0;
}
static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio)
{
struct bcma_drv_cc *cc = gpiochip_get_data(chip);
/* clear pullup */
bcma_chipco_gpio_pullup(cc, 1 << gpio, 0);
}
#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
static void bcma_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct bcma_drv_cc *cc = gpiochip_get_data(gc);
int gpio = irqd_to_hwirq(d);
u32 val = bcma_chipco_gpio_in(cc, BIT(gpio));
gpiochip_enable_irq(gc, gpio);
bcma_chipco_gpio_polarity(cc, BIT(gpio), val);
bcma_chipco_gpio_intmask(cc, BIT(gpio), BIT(gpio));
}
static void bcma_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct bcma_drv_cc *cc = gpiochip_get_data(gc);
int gpio = irqd_to_hwirq(d);
bcma_chipco_gpio_intmask(cc, BIT(gpio), 0);
gpiochip_disable_irq(gc, gpio);
}
static const struct irq_chip bcma_gpio_irq_chip = {
.name = "BCMA-GPIO",
.irq_mask = bcma_gpio_irq_mask,
.irq_unmask = bcma_gpio_irq_unmask,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static irqreturn_t bcma_gpio_irq_handler(int irq, void *dev_id)
{
struct bcma_drv_cc *cc = dev_id;
struct gpio_chip *gc = &cc->gpio;
u32 val = bcma_cc_read32(cc, BCMA_CC_GPIOIN);
u32 mask = bcma_cc_read32(cc, BCMA_CC_GPIOIRQ);
u32 pol = bcma_cc_read32(cc, BCMA_CC_GPIOPOL);
unsigned long irqs = (val ^ pol) & mask;
int gpio;
if (!irqs)
return IRQ_NONE;
for_each_set_bit(gpio, &irqs, gc->ngpio)
generic_handle_domain_irq_safe(gc->irq.domain, gpio);
bcma_chipco_gpio_polarity(cc, irqs, val & irqs);
return IRQ_HANDLED;
}
static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
{
struct gpio_chip *chip = &cc->gpio;
struct gpio_irq_chip *girq = &chip->irq;
int hwirq, err;
if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
return 0;
hwirq = bcma_core_irq(cc->core, 0);
err = request_irq(hwirq, bcma_gpio_irq_handler, IRQF_SHARED, "gpio",
cc);
if (err)
return err;
bcma_chipco_gpio_intmask(cc, ~0, 0);
bcma_cc_set32(cc, BCMA_CC_IRQMASK, BCMA_CC_IRQ_GPIO);
gpio_irq_chip_set_chip(girq, &bcma_gpio_irq_chip);
/* This will let us handle the parent IRQ in the driver */
girq->parent_handler = NULL;
girq->num_parents = 0;
girq->parents = NULL;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_simple_irq;
return 0;
}
static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
{
if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)
return;
bcma_cc_mask32(cc, BCMA_CC_IRQMASK, ~BCMA_CC_IRQ_GPIO);
free_irq(bcma_core_irq(cc->core, 0), cc);
}
#else
static int bcma_gpio_irq_init(struct bcma_drv_cc *cc)
{
return 0;
}
static void bcma_gpio_irq_exit(struct bcma_drv_cc *cc)
{
}
#endif
int bcma_gpio_init(struct bcma_drv_cc *cc)
{
struct bcma_bus *bus = cc->core->bus;
struct gpio_chip *chip = &cc->gpio;
int err;
chip->label = "bcma_gpio";
chip->owner = THIS_MODULE;
chip->request = bcma_gpio_request;
chip->free = bcma_gpio_free;
chip->get = bcma_gpio_get_value;
chip->set = bcma_gpio_set_value;
chip->direction_input = bcma_gpio_direction_input;
chip->direction_output = bcma_gpio_direction_output;
chip->parent = bus->dev;
chip->fwnode = dev_fwnode(&cc->core->dev);
switch (bus->chipinfo.id) {
case BCMA_CHIP_ID_BCM4707:
case BCMA_CHIP_ID_BCM5357:
case BCMA_CHIP_ID_BCM53572:
case BCMA_CHIP_ID_BCM53573:
case BCMA_CHIP_ID_BCM47094:
chip->ngpio = 32;
break;
default:
chip->ngpio = 16;
}
/*
* Register SoC GPIO devices with absolute GPIO pin base.
* On MIPS, we don't have Device Tree and we can't use relative (per chip)
* GPIO numbers.
* On some ARM devices, user space may want to access some system GPIO
* pins directly, which is easier to do with a predictable GPIO base.
*/
if (IS_BUILTIN(CONFIG_BCM47XX) ||
cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
chip->base = bus->num * BCMA_GPIO_MAX_PINS;
else
chip->base = -1;
err = bcma_gpio_irq_init(cc);
if (err)
return err;
err = gpiochip_add_data(chip, cc);
if (err) {
bcma_gpio_irq_exit(cc);
return err;
}
return 0;
}
int bcma_gpio_unregister(struct bcma_drv_cc *cc)
{
bcma_gpio_irq_exit(cc);
gpiochip_remove(&cc->gpio);
return 0;
}