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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
537 lines
13 KiB
C
537 lines
13 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/timer.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/gpio.h>
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#include <bcm63xx_regs.h>
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#include <bcm63xx_io.h>
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#include "bcm63xx_pcmcia.h"
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#define PFX "bcm63xx_pcmcia: "
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#ifdef CONFIG_CARDBUS
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/* if cardbus is used, platform device needs reference to actual pci
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* device */
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static struct pci_dev *bcm63xx_cb_dev;
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#endif
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/*
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* read/write helper for pcmcia regs
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*/
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static inline u32 pcmcia_readl(struct bcm63xx_pcmcia_socket *skt, u32 off)
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{
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return bcm_readl(skt->base + off);
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}
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static inline void pcmcia_writel(struct bcm63xx_pcmcia_socket *skt,
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u32 val, u32 off)
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{
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bcm_writel(val, skt->base + off);
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}
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/*
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* This callback should (re-)initialise the socket, turn on status
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* interrupts and PCMCIA bus, and wait for power to stabilise so that
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* the card status signals report correctly.
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*
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* Hardware cannot do that.
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*/
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static int bcm63xx_pcmcia_sock_init(struct pcmcia_socket *sock)
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{
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return 0;
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}
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/*
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* This callback should remove power on the socket, disable IRQs from
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* the card, turn off status interrupts, and disable the PCMCIA bus.
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*
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* Hardware cannot do that.
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*/
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static int bcm63xx_pcmcia_suspend(struct pcmcia_socket *sock)
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{
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return 0;
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}
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/*
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* Implements the set_socket() operation for the in-kernel PCMCIA
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* service (formerly SS_SetSocket in Card Services). We more or
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* less punt all of this work and let the kernel handle the details
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* of power configuration, reset, &c. We also record the value of
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* `state' in order to regurgitate it to the PCMCIA core later.
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*/
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static int bcm63xx_pcmcia_set_socket(struct pcmcia_socket *sock,
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socket_state_t *state)
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{
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struct bcm63xx_pcmcia_socket *skt;
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unsigned long flags;
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u32 val;
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skt = sock->driver_data;
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spin_lock_irqsave(&skt->lock, flags);
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/* note: hardware cannot control socket power, so we will
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* always report SS_POWERON */
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/* apply socket reset */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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if (state->flags & SS_RESET)
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val |= PCMCIA_C1_RESET_MASK;
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else
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val &= ~PCMCIA_C1_RESET_MASK;
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/* reverse reset logic for cardbus card */
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if (skt->card_detected && (skt->card_type & CARD_CARDBUS))
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val ^= PCMCIA_C1_RESET_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* keep requested state for event reporting */
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skt->requested_state = *state;
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spin_unlock_irqrestore(&skt->lock, flags);
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return 0;
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}
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/*
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* identity cardtype from VS[12] input, CD[12] input while only VS2 is
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* floating, and CD[12] input while only VS1 is floating
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*/
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enum {
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IN_VS1 = (1 << 0),
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IN_VS2 = (1 << 1),
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IN_CD1_VS2H = (1 << 2),
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IN_CD2_VS2H = (1 << 3),
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IN_CD1_VS1H = (1 << 4),
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IN_CD2_VS1H = (1 << 5),
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};
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static const u8 vscd_to_cardtype[] = {
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/* VS1 float, VS2 float */
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[IN_VS1 | IN_VS2] = (CARD_PCCARD | CARD_5V),
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/* VS1 grounded, VS2 float */
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[IN_VS2] = (CARD_PCCARD | CARD_5V | CARD_3V),
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/* VS1 grounded, VS2 grounded */
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[0] = (CARD_PCCARD | CARD_5V | CARD_3V | CARD_XV),
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/* VS1 tied to CD1, VS2 float */
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[IN_VS1 | IN_VS2 | IN_CD1_VS1H] = (CARD_CARDBUS | CARD_3V),
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/* VS1 grounded, VS2 tied to CD2 */
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[IN_VS2 | IN_CD2_VS2H] = (CARD_CARDBUS | CARD_3V | CARD_XV),
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/* VS1 tied to CD2, VS2 grounded */
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[IN_VS1 | IN_CD2_VS1H] = (CARD_CARDBUS | CARD_3V | CARD_XV | CARD_YV),
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/* VS1 float, VS2 grounded */
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[IN_VS1] = (CARD_PCCARD | CARD_XV),
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/* VS1 float, VS2 tied to CD2 */
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[IN_VS1 | IN_VS2 | IN_CD2_VS2H] = (CARD_CARDBUS | CARD_3V),
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/* VS1 float, VS2 tied to CD1 */
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[IN_VS1 | IN_VS2 | IN_CD1_VS2H] = (CARD_CARDBUS | CARD_XV | CARD_YV),
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/* VS1 tied to CD2, VS2 float */
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[IN_VS1 | IN_VS2 | IN_CD2_VS1H] = (CARD_CARDBUS | CARD_YV),
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/* VS2 grounded, VS1 is tied to CD1, CD2 is grounded */
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[IN_VS1 | IN_CD1_VS1H] = 0, /* ignore cardbay */
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};
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/*
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* poll hardware to check card insertion status
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*/
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static unsigned int __get_socket_status(struct bcm63xx_pcmcia_socket *skt)
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{
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unsigned int stat;
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u32 val;
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stat = 0;
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/* check CD for card presence */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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if (!(val & PCMCIA_C1_CD1_MASK) && !(val & PCMCIA_C1_CD2_MASK))
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stat |= SS_DETECT;
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/* if new insertion, detect cardtype */
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if ((stat & SS_DETECT) && !skt->card_detected) {
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unsigned int stat = 0;
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/* float VS1, float VS2 */
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val |= PCMCIA_C1_VS1OE_MASK;
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val |= PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read VS[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_VS1_MASK) ? IN_VS1 : 0;
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stat |= (val & PCMCIA_C1_VS2_MASK) ? IN_VS2 : 0;
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/* drive VS1 low, float VS2 */
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val &= ~PCMCIA_C1_VS1OE_MASK;
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val |= PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read CD[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_CD1_MASK) ? IN_CD1_VS2H : 0;
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stat |= (val & PCMCIA_C1_CD2_MASK) ? IN_CD2_VS2H : 0;
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/* float VS1, drive VS2 low */
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val |= PCMCIA_C1_VS1OE_MASK;
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val &= ~PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read CD[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_CD1_MASK) ? IN_CD1_VS1H : 0;
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stat |= (val & PCMCIA_C1_CD2_MASK) ? IN_CD2_VS1H : 0;
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/* guess cardtype from all this */
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skt->card_type = vscd_to_cardtype[stat];
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if (!skt->card_type)
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dev_err(&skt->socket.dev, "unsupported card type\n");
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/* drive both VS pin to 0 again */
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val &= ~(PCMCIA_C1_VS1OE_MASK | PCMCIA_C1_VS2OE_MASK);
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/* enable correct logic */
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val &= ~(PCMCIA_C1_EN_PCMCIA_MASK | PCMCIA_C1_EN_CARDBUS_MASK);
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if (skt->card_type & CARD_PCCARD)
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val |= PCMCIA_C1_EN_PCMCIA_MASK;
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else
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val |= PCMCIA_C1_EN_CARDBUS_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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}
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skt->card_detected = (stat & SS_DETECT) ? 1 : 0;
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/* report card type/voltage */
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if (skt->card_type & CARD_CARDBUS)
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stat |= SS_CARDBUS;
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if (skt->card_type & CARD_3V)
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stat |= SS_3VCARD;
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if (skt->card_type & CARD_XV)
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stat |= SS_XVCARD;
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stat |= SS_POWERON;
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if (gpio_get_value(skt->pd->ready_gpio))
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stat |= SS_READY;
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return stat;
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}
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/*
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* core request to get current socket status
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*/
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static int bcm63xx_pcmcia_get_status(struct pcmcia_socket *sock,
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unsigned int *status)
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{
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struct bcm63xx_pcmcia_socket *skt;
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skt = sock->driver_data;
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spin_lock_bh(&skt->lock);
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*status = __get_socket_status(skt);
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spin_unlock_bh(&skt->lock);
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return 0;
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}
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/*
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* socket polling timer callback
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*/
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static void bcm63xx_pcmcia_poll(unsigned long data)
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{
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struct bcm63xx_pcmcia_socket *skt;
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unsigned int stat, events;
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skt = (struct bcm63xx_pcmcia_socket *)data;
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spin_lock_bh(&skt->lock);
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stat = __get_socket_status(skt);
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/* keep only changed bits, and mask with required one from the
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* core */
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events = (stat ^ skt->old_status) & skt->requested_state.csc_mask;
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skt->old_status = stat;
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spin_unlock_bh(&skt->lock);
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if (events)
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pcmcia_parse_events(&skt->socket, events);
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mod_timer(&skt->timer,
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jiffies + msecs_to_jiffies(BCM63XX_PCMCIA_POLL_RATE));
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}
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static int bcm63xx_pcmcia_set_io_map(struct pcmcia_socket *sock,
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struct pccard_io_map *map)
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{
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/* this doesn't seem to be called by pcmcia layer if static
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* mapping is used */
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return 0;
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}
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static int bcm63xx_pcmcia_set_mem_map(struct pcmcia_socket *sock,
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struct pccard_mem_map *map)
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{
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struct bcm63xx_pcmcia_socket *skt;
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struct resource *res;
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skt = sock->driver_data;
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if (map->flags & MAP_ATTRIB)
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res = skt->attr_res;
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else
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res = skt->common_res;
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map->static_start = res->start + map->card_start;
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return 0;
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}
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static struct pccard_operations bcm63xx_pcmcia_operations = {
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.init = bcm63xx_pcmcia_sock_init,
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.suspend = bcm63xx_pcmcia_suspend,
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.get_status = bcm63xx_pcmcia_get_status,
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.set_socket = bcm63xx_pcmcia_set_socket,
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.set_io_map = bcm63xx_pcmcia_set_io_map,
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.set_mem_map = bcm63xx_pcmcia_set_mem_map,
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};
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/*
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* register pcmcia socket to core
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*/
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static int __devinit bcm63xx_drv_pcmcia_probe(struct platform_device *pdev)
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{
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struct bcm63xx_pcmcia_socket *skt;
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struct pcmcia_socket *sock;
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struct resource *res, *irq_res;
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unsigned int regmem_size = 0, iomem_size = 0;
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u32 val;
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int ret;
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skt = kzalloc(sizeof(*skt), GFP_KERNEL);
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if (!skt)
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return -ENOMEM;
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spin_lock_init(&skt->lock);
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sock = &skt->socket;
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sock->driver_data = skt;
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/* make sure we have all resources we need */
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skt->common_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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skt->attr_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
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irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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skt->pd = pdev->dev.platform_data;
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if (!skt->common_res || !skt->attr_res || !irq_res || !skt->pd) {
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ret = -EINVAL;
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goto err;
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}
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/* remap pcmcia registers */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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regmem_size = resource_size(res);
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if (!request_mem_region(res->start, regmem_size, "bcm63xx_pcmcia")) {
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ret = -EINVAL;
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goto err;
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}
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skt->reg_res = res;
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skt->base = ioremap(res->start, regmem_size);
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if (!skt->base) {
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ret = -ENOMEM;
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goto err;
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}
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/* remap io registers */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
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iomem_size = resource_size(res);
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skt->io_base = ioremap(res->start, iomem_size);
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if (!skt->io_base) {
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ret = -ENOMEM;
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goto err;
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}
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/* resources are static */
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sock->resource_ops = &pccard_static_ops;
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sock->ops = &bcm63xx_pcmcia_operations;
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sock->owner = THIS_MODULE;
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sock->dev.parent = &pdev->dev;
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sock->features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
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sock->io_offset = (unsigned long)skt->io_base;
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sock->pci_irq = irq_res->start;
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#ifdef CONFIG_CARDBUS
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sock->cb_dev = bcm63xx_cb_dev;
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if (bcm63xx_cb_dev)
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sock->features |= SS_CAP_CARDBUS;
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#endif
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/* assume common & attribute memory have the same size */
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sock->map_size = resource_size(skt->common_res);
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/* initialize polling timer */
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setup_timer(&skt->timer, bcm63xx_pcmcia_poll, (unsigned long)skt);
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/* initialize pcmcia control register, drive VS[12] to 0,
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* leave CB IDSEL to the old value since it is set by the PCI
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* layer */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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val &= PCMCIA_C1_CBIDSEL_MASK;
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val |= PCMCIA_C1_EN_PCMCIA_GPIO_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/*
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* Hardware has only one set of timings registers, not one for
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* each memory access type, so we configure them for the
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* slowest one: attribute memory.
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*/
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val = PCMCIA_C2_DATA16_MASK;
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val |= 10 << PCMCIA_C2_RWCOUNT_SHIFT;
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val |= 6 << PCMCIA_C2_INACTIVE_SHIFT;
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val |= 3 << PCMCIA_C2_SETUP_SHIFT;
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val |= 3 << PCMCIA_C2_HOLD_SHIFT;
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pcmcia_writel(skt, val, PCMCIA_C2_REG);
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ret = pcmcia_register_socket(sock);
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if (ret)
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goto err;
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/* start polling socket */
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mod_timer(&skt->timer,
|
|
jiffies + msecs_to_jiffies(BCM63XX_PCMCIA_POLL_RATE));
|
|
|
|
platform_set_drvdata(pdev, skt);
|
|
return 0;
|
|
|
|
err:
|
|
if (skt->io_base)
|
|
iounmap(skt->io_base);
|
|
if (skt->base)
|
|
iounmap(skt->base);
|
|
if (skt->reg_res)
|
|
release_mem_region(skt->reg_res->start, regmem_size);
|
|
kfree(skt);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit bcm63xx_drv_pcmcia_remove(struct platform_device *pdev)
|
|
{
|
|
struct bcm63xx_pcmcia_socket *skt;
|
|
struct resource *res;
|
|
|
|
skt = platform_get_drvdata(pdev);
|
|
del_timer_sync(&skt->timer);
|
|
iounmap(skt->base);
|
|
iounmap(skt->io_base);
|
|
res = skt->reg_res;
|
|
release_mem_region(res->start, resource_size(res));
|
|
kfree(skt);
|
|
return 0;
|
|
}
|
|
|
|
struct platform_driver bcm63xx_pcmcia_driver = {
|
|
.probe = bcm63xx_drv_pcmcia_probe,
|
|
.remove = __devexit_p(bcm63xx_drv_pcmcia_remove),
|
|
.driver = {
|
|
.name = "bcm63xx_pcmcia",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
static int __devinit bcm63xx_cb_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
/* keep pci device */
|
|
bcm63xx_cb_dev = dev;
|
|
return platform_driver_register(&bcm63xx_pcmcia_driver);
|
|
}
|
|
|
|
static void __devexit bcm63xx_cb_exit(struct pci_dev *dev)
|
|
{
|
|
platform_driver_unregister(&bcm63xx_pcmcia_driver);
|
|
bcm63xx_cb_dev = NULL;
|
|
}
|
|
|
|
static struct pci_device_id bcm63xx_cb_table[] = {
|
|
{
|
|
.vendor = PCI_VENDOR_ID_BROADCOM,
|
|
.device = BCM6348_CPU_ID,
|
|
.subvendor = PCI_VENDOR_ID_BROADCOM,
|
|
.subdevice = PCI_ANY_ID,
|
|
.class = PCI_CLASS_BRIDGE_CARDBUS << 8,
|
|
.class_mask = ~0,
|
|
},
|
|
|
|
{
|
|
.vendor = PCI_VENDOR_ID_BROADCOM,
|
|
.device = BCM6358_CPU_ID,
|
|
.subvendor = PCI_VENDOR_ID_BROADCOM,
|
|
.subdevice = PCI_ANY_ID,
|
|
.class = PCI_CLASS_BRIDGE_CARDBUS << 8,
|
|
.class_mask = ~0,
|
|
},
|
|
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, bcm63xx_cb_table);
|
|
|
|
static struct pci_driver bcm63xx_cardbus_driver = {
|
|
.name = "bcm63xx_cardbus",
|
|
.id_table = bcm63xx_cb_table,
|
|
.probe = bcm63xx_cb_probe,
|
|
.remove = __devexit_p(bcm63xx_cb_exit),
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* if cardbus support is enabled, register our platform device after
|
|
* our fake cardbus bridge has been registered
|
|
*/
|
|
static int __init bcm63xx_pcmcia_init(void)
|
|
{
|
|
#ifdef CONFIG_CARDBUS
|
|
return pci_register_driver(&bcm63xx_cardbus_driver);
|
|
#else
|
|
return platform_driver_register(&bcm63xx_pcmcia_driver);
|
|
#endif
|
|
}
|
|
|
|
static void __exit bcm63xx_pcmcia_exit(void)
|
|
{
|
|
#ifdef CONFIG_CARDBUS
|
|
return pci_unregister_driver(&bcm63xx_cardbus_driver);
|
|
#else
|
|
platform_driver_unregister(&bcm63xx_pcmcia_driver);
|
|
#endif
|
|
}
|
|
|
|
module_init(bcm63xx_pcmcia_init);
|
|
module_exit(bcm63xx_pcmcia_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
|
|
MODULE_DESCRIPTION("Linux PCMCIA Card Services: bcm63xx Socket Controller");
|