From patchwork Fri Jul 8 06:22:46 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajay Bhargav X-Patchwork-Id: 103767 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 72BA91007D1 for ; Fri, 8 Jul 2011 16:23:15 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 91458280AE; Fri, 8 Jul 2011 08:23:13 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HFRFUR4wFG6y; Fri, 8 Jul 2011 08:23:12 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id B720A28091; Fri, 8 Jul 2011 08:23:09 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 420CA28096 for ; Fri, 8 Jul 2011 08:23:06 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id q-VMfuGKreHm for ; Fri, 8 Jul 2011 08:23:03 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from ahm.einfochips.com (ahm.einfochips.com [203.88.139.151]) by theia.denx.de (Postfix) with ESMTP id DF0842808C for ; Fri, 8 Jul 2011 08:23:01 +0200 (CEST) Received: from localhost (localhost.localdomain [127.0.0.1]) by ahm.einfochips.com (Postfix) with ESMTP id 48BE4A608006; Fri, 8 Jul 2011 11:43:49 +0530 (IST) X-Virus-Scanned: amavisd-new at einfochips.com Received: from ahm.einfochips.com ([127.0.0.1]) by localhost (ahm.einfochips.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JstbS8D4ztQM; Fri, 8 Jul 2011 11:43:49 +0530 (IST) Received: from localhost.localdomain (unknown [192.168.9.91]) by ahm.einfochips.com (Postfix) with ESMTPA id 302EC7FA00E7; Fri, 8 Jul 2011 11:43:49 +0530 (IST) From: Ajay Bhargav To: prafulla@marvell.com Date: Fri, 8 Jul 2011 11:52:46 +0530 Message-Id: <1310106168-17166-2-git-send-email-ajay.bhargav@einfochips.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: Cc: u-boot@lists.denx.de, Ajay Bhargav Subject: [U-Boot] [PATCH 2/4] Armada100: SPI Flash support for Marvell gplugD X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.9 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de SPI Flash support added for Marvell GuruPlug-Display. Environment variables are now stored in flash. Signed-off-by: Ajay Bhargav --- arch/arm/include/asm/arch-armada100/gpio.h | 2 +- arch/arm/include/asm/arch-armada100/mfp.h | 6 + arch/arm/include/asm/arch-armada100/regs-ssp.h | 165 +++++++++++++++ board/Marvell/gplugd/gplugd.c | 20 ++ drivers/spi/Makefile | 1 + drivers/spi/pxa3xx_spi.c | 256 ++++++++++++++++++++++++ include/configs/gplugd.h | 32 +++- 7 files changed, 475 insertions(+), 7 deletions(-) create mode 100644 arch/arm/include/asm/arch-armada100/regs-ssp.h create mode 100644 drivers/spi/pxa3xx_spi.c diff --git a/arch/arm/include/asm/arch-armada100/gpio.h b/arch/arm/include/asm/arch-armada100/gpio.h index e13c2da..dd23908 100644 --- a/arch/arm/include/asm/arch-armada100/gpio.h +++ b/arch/arm/include/asm/arch-armada100/gpio.h @@ -25,7 +25,7 @@ #define __PXA_GPIO_H -#define GPIO_REGS_VIRT (0xD4019000) +#define GPIO_REGS_VIRT (0xD4019000) #define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2)) #define GPIO_REG(x) (GPIO_REGS_VIRT + (x)) diff --git a/arch/arm/include/asm/arch-armada100/mfp.h b/arch/arm/include/asm/arch-armada100/mfp.h index da76b58..e94be3a 100644 --- a/arch/arm/include/asm/arch-armada100/mfp.h +++ b/arch/arm/include/asm/arch-armada100/mfp.h @@ -83,6 +83,12 @@ #define MFP101_ETH_MDIO (MFP_REG(0x194) | MFP_AF5 | MFP_DRIVE_MEDIUM) #define MFP103_ETH_RXDV (MFP_REG(0x19C) | MFP_AF5 | MFP_DRIVE_MEDIUM) +/* SPI */ +#define MFP107_SSP2_RXD (MFP_REG(0x1AC) | MFP_AF4 | MFP_DRIVE_MEDIUM) +#define MFP108_SSP2_TXD (MFP_REG(0x1B0) | MFP_AF4 | MFP_DRIVE_MEDIUM) +#define MFP110_SSP2_CS (MFP_REG(0x1B8) | MFP_AF0 | MFP_DRIVE_MEDIUM) +#define MFP111_SSP2_CLK (MFP_REG(0x1BC) | MFP_AF4 | MFP_DRIVE_MEDIUM) + /* More macros can be defined here... */ #define MFP_PIN_MAX 117 diff --git a/arch/arm/include/asm/arch-armada100/regs-ssp.h b/arch/arm/include/asm/arch-armada100/regs-ssp.h new file mode 100644 index 0000000..dbe7e83 --- /dev/null +++ b/arch/arm/include/asm/arch-armada100/regs-ssp.h @@ -0,0 +1,165 @@ +/************************************************************************** + * + * Copyright (c) 2009, 2010 Marvell International Ltd. + * + * This file is part of GNU program. + * + * GNU 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. + * + * GNU program is distributed in the hope that 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/old-licenses/gpl-2.0.html + * + *************************************************************************/ + +#ifndef __ASM_ARCH_REGS_SSP_H +#define __ASM_ARCH_REGS_SSP_H + +/* + * SSP Serial Port Registers + * PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different. + * PXA255, PXA26x and PXA27x have extra ports, registers and bits. + */ + +#define SSCR0 (0x00) /* SSP Control Register 0 */ +#define SSCR1 (0x04) /* SSP Control Register 1 */ +#define SSSR (0x08) /* SSP Status Register */ +#define SSITR (0x0C) /* SSP Interrupt Test Register */ +#define SSDR (0x10) /* SSP Data Write/Data Read Register */ + +#define SSTO (0x28) /* SSP Time Out Register */ +#define SSPSP (0x2C) /* SSP Programmable Serial Protocol */ +#define SSTSA (0x30) /* SSP Tx Timeslot Active */ +#define SSRSA (0x34) /* SSP Rx Timeslot Active */ +#define SSTSS (0x38) /* SSP Timeslot Status */ +#define SSACD (0x3C) /* SSP Audio Clock Divider */ + +#if defined(CONFIG_PXA3xx) || defined(CONFIG_CPU_PXA910) +#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */ +#endif + +/* Common PXA2xx bits first */ +#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */ +#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */ +#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */ +#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial + Peripheral Interface */ +#define SSCR0_TI (0x1 << 4) /* TI's Synchronous + Serial Protocol (SSP) */ +#define SSCR0_National (0x2 << 4) /* National Microwire */ +#define SSCR0_ECS (1 << 6) /* External clock select */ +#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */ + +#if defined(CONFIG_PXA25x) +#define SSCR0_SCR (0x0000ff00) /* Serial Clock Rate (mask) */ +#define SSCR0_SerClkDiv(x) ((((x) - 2)/2) << 8) /* Divisor [2..512] */ +#elif defined(CONFIG_PXA27x) || \ + defined(CONFIG_PXA3xx) || \ + defined(CONFIG_CPU_PXA910) +#define SSCR0_SCR (0x000fff00) /* Serial Clock Rate (mask) */ +#define SSCR0_SerClkDiv(x) (((x) - 1) << 8) /* Divisor [1..4096] */ +#endif + +#if defined(CONFIG_PXA27x) || \ + defined(CONFIG_PXA3xx) || \ + defined(CONFIG_CPU_PXA910) +#define SSCR0_EDSS (1 << 20) /* Extended data size select */ +#define SSCR0_NCS (1 << 21) /* Network clock select */ +#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun + interrupt mask */ +#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun + interrupt mask */ +#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */ +#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) + /* Time slots per frame [1..8] */ +#define SSCR0_ADC (1 << 30) /* Audio clock select */ +#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */ +#endif + +#if defined(CONFIG_PXA3xx) || defined(CONFIG_CPU_PXA910) +#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */ +#endif + +#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */ +#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */ +#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */ +#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK + polarity setting */ +#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */ +#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */ +#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */ +#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */ +#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */ +#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */ + +#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */ +#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */ +#define SSSR_BSY (1 << 4) /* SSP Busy */ +#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */ +#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */ +#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */ + +#define SSCR0_TIM (1 << 23) /* Transmit FIFO Under Run + Interrupt Mask */ +#define SSCR0_RIM (1 << 22) /* Receive FIFO Over + Run interrupt Mask */ +#define SSCR0_NCS (1 << 21) /* Network Clock Select */ +#define SSCR0_EDSS (1 << 20) /* Extended Data Size Select */ + +/* extra bits in PXA255, PXA26x and PXA27x SSP ports */ +#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */ +#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */ +#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */ +#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */ +#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */ +#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */ +#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */ +#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */ +#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */ +#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */ +#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */ +#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */ +#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */ +#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */ +#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */ +#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing + Byte Interupt Enable */ +#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */ +#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */ +#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */ + +#define SSSR_BCE (1 << 23) /* Bit Count Error */ +#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */ +#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */ +#define SSSR_EOC (1 << 20) /* End Of Chain */ +#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */ +#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */ + +#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */ +#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */ +#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */ +#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */ +#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */ +#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */ +#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */ +#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */ +#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */ + +#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */ +#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */ +#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */ +#if defined(CONFIG_PXA3xx) || defined(CONFIG_CPU_PXA910) +#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */ +#endif + + +#endif /* __ASM_ARCH_REGS_SSP_H */ diff --git a/board/Marvell/gplugd/gplugd.c b/board/Marvell/gplugd/gplugd.c index 81770fc..0c7a8fd 100644 --- a/board/Marvell/gplugd/gplugd.c +++ b/board/Marvell/gplugd/gplugd.c @@ -47,6 +47,7 @@ DECLARE_GLOBAL_DATA_PTR; #define PHY_LED_VAL 0x5b /* LINK LED1, ACT LED2 */ #define PHY_RST 104 /* GPIO104 - PHY RESET */ #define RTC_IRQ 102 /* GPIO102 - RTC IRQ Input */ +#define SSP2CS 110 /* GPIO110 - SSP Chip Select */ #define FE_CLK_RST 0x1 #define FE_CLK_ENA 0x8 @@ -80,6 +81,11 @@ int board_early_init_f(void) MFP101_ETH_MDIO, MFP103_ETH_RXDV, + MFP107_SSP2_RXD, + MFP108_SSP2_TXD, + MFP110_SSP2_CS, + MFP111_SSP2_CLK, + MFP_EOC /*End of configuration*/ }; /* configure MFP's */ @@ -93,11 +99,25 @@ int board_early_init_f(void) int board_init(void) { + struct armd1apb1_registers *apb1_regs = + (struct armd1apb1_registers *)ARMD1_APBC1_BASE; + struct armd1apb2_registers *apb2_regs = + (struct armd1apb2_registers *)ARMD1_APBC2_BASE; + /* arch number of Board */ gd->bd->bi_arch_number = MACH_TYPE_SHEEVAD; /* adress of boot parameters */ gd->bd->bi_boot_params = armd1_sdram_base(0) + 0x100; +#ifdef CONFIG_PXA3XX_SPI + /* Enable SSP2 clock */ + writel(0x03, &apb2_regs->ssp2_clkrst); + /* enable GPIO clock */ + writel(0x01, &apb1_regs->gpio); + /* configure GPIO110 as CS# */ + gpio_direction_output(SSP2CS, GPIO_SET); +#endif + return 0; } diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index a9b1ca4..9626772 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -40,6 +40,7 @@ COBJS-$(CONFIG_OMAP3_SPI) += omap3_spi.o COBJS-$(CONFIG_SOFT_SPI) += soft_spi.o COBJS-$(CONFIG_SH_SPI) += sh_spi.o COBJS-$(CONFIG_FSL_ESPI) += fsl_espi.o +COBJS-$(CONFIG_PXA3XX_SPI) += pxa3xx_spi.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/spi/pxa3xx_spi.c b/drivers/spi/pxa3xx_spi.c new file mode 100644 index 0000000..8d05f90 --- /dev/null +++ b/drivers/spi/pxa3xx_spi.c @@ -0,0 +1,256 @@ +/************************************************************************** + * + * Copyright (c) 2009, 2010 Marvell International Ltd. + * + * This file is part of GNU program. + * + * GNU 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. + * + * GNU program is distributed in the hope that 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/old-licenses/gpl-2.0.html + * + *************************************************************************/ + +/* + * Driver for simulating ssp as spi device for pxa + * + * Copyright (c) 2009 Marvell Inc. + * Lei Wen + * + * Licensed under the GPL-2 or later. + */ + + +#include +#include +#include + +#include +#include +#include + +struct pxa_spi_slave { + struct spi_slave slave; + u32 cr0, cr1; + u32 int_cr1; + u32 clear_sr; + const void *tx; + void *rx; + int gpio_cs_inverted; + + void (*write)(struct pxa_spi_slave *pss); + void (*read)(struct pxa_spi_slave *pss); +}; + +#define to_pxa_spi_slave(s) container_of(s, struct pxa_spi_slave, slave) + +#define DEFINE_SSP_REG(reg, off) \ + static inline u32 read_##reg(void) \ +{ return __raw_readl(CONFIG_SYS_SSP_BASE + (off)); } \ +\ +static inline void write_##reg(u32 v) \ +{ __raw_writel(v, CONFIG_SYS_SSP_BASE + (off)); } + +DEFINE_SSP_REG(SSCR0, 0x00) +DEFINE_SSP_REG(SSCR1, 0x04) +DEFINE_SSP_REG(SSSR, 0x08) +DEFINE_SSP_REG(SSITR, 0x0c) +DEFINE_SSP_REG(SSDR, 0x10) +DEFINE_SSP_REG(SSTO, 0x28) +DEFINE_SSP_REG(SSPSP, 0x2c) + +#define DEFAULT_WORD_LEN 8 +#define SSP_FLUSH_NUM 0x2000 +#define RX_THRESH_DFLT 8 +#define TX_THRESH_DFLT 8 +#define TIMOUT_DFLT 1000 + +void spi_cs_activate(struct spi_slave *slave) +{ + struct pxa_spi_slave *pss = to_pxa_spi_slave(slave); + gpio_set_value(slave->cs, pss->gpio_cs_inverted); +} + +void spi_cs_deactivate(struct spi_slave *slave) +{ + struct pxa_spi_slave *pss = to_pxa_spi_slave(slave); + gpio_set_value(slave->cs, !pss->gpio_cs_inverted); +} + +static void null_writer(struct pxa_spi_slave *pss) +{ + while (!(read_SSSR() & SSSR_TNF)) + continue; + + write_SSDR(0); +} + +static void null_reader(struct pxa_spi_slave *pss) +{ + while (!(read_SSSR() & SSSR_RNE)) + continue; + read_SSDR(); +} + +static void u8_writer(struct pxa_spi_slave *pss) +{ + while (!(read_SSSR() & SSSR_TNF)) + continue; + + write_SSDR(*(u8 *)(pss->tx)); + ++pss->tx; +} + +static void u8_reader(struct pxa_spi_slave *pss) +{ + while (!(read_SSSR() & SSSR_RNE)) + continue; + *(u8 *)(pss->rx) = read_SSDR(); + ++pss->rx; +} + +static int flush(void) +{ + unsigned long limit = SSP_FLUSH_NUM; + + do { + while (read_SSSR() & SSSR_RNE) + read_SSDR(); + } while ((read_SSSR() & SSSR_BSY) && limit--); + write_SSSR(SSSR_ROR); + + return limit; +} + +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode) +{ + struct pxa_spi_slave *pss; + unsigned int clk_div; + + clk_div = ((CONFIG_SSP_CLK / max_hz - 1) & 0xfff) << 8; + + pss = malloc(sizeof(*pss)); + if (!pss) + return NULL; + + pss->slave.bus = bus; + pss->slave.cs = cs; + + pss->cr0 = clk_div + | SSCR0_Motorola + | SSCR0_DataSize(DEFAULT_WORD_LEN) + | SSCR0_SSE; + + pss->cr1 = (SSCR1_RxTresh(RX_THRESH_DFLT) & SSCR1_RFT) | + (SSCR1_TxTresh(TX_THRESH_DFLT) & SSCR1_TFT); + pss->cr1 &= ~(SSCR1_SPO | SSCR1_SPH); + pss->cr1 |= (((mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0) + | (((mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0); + + pss->int_cr1 = SSCR1_TIE | SSCR1_RIE | SSCR1_TINTE; + pss->clear_sr = SSSR_ROR | SSSR_TINT; + + pss->gpio_cs_inverted = mode & SPI_CS_HIGH; + gpio_set_value(cs, !pss->gpio_cs_inverted); + + return &pss->slave; +} + +void spi_free_slave(struct spi_slave *slave) +{ + struct pxa_spi_slave *pss = to_pxa_spi_slave(slave); + free(pss); +} + +void spi_init() +{ + /* Load default SSP configuration */ + write_SSCR0(0); + write_SSCR1(SSCR1_RxTresh(RX_THRESH_DFLT) | + SSCR1_TxTresh(TX_THRESH_DFLT)); + write_SSCR0(SSCR0_SerClkDiv(2) + | SSCR0_Motorola + | SSCR0_DataSize(DEFAULT_WORD_LEN)); + write_SSTO(0); + write_SSPSP(0); +} + +int spi_claim_bus(struct spi_slave *slave) +{ + debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs); + if (flush() == 0) + return -1; + + return 0; +} + +void spi_release_bus(struct spi_slave *slave) +{ +} + +int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, + void *din, unsigned long flags) +{ + struct pxa_spi_slave *pss = to_pxa_spi_slave(slave); + uint bytes = bitlen / 8; + unsigned long limit; + int ret = 0; + + if (bitlen == 0) + goto done; + + /* we can only do 8 bit transfers */ + if (bitlen % 8) { + flags |= SPI_XFER_END; + goto done; + } + + if (dout) { + pss->tx = dout; + pss->write = u8_writer; + } else + pss->write = null_writer; + + if (din) { + pss->rx = din; + pss->read = u8_reader; + } else + pss->read = null_reader; + + if (flags & SPI_XFER_BEGIN) { + spi_cs_activate(slave); + write_SSCR1(pss->cr1 | pss->int_cr1); + write_SSTO(TIMOUT_DFLT); + write_SSCR0(pss->cr0); + } + + while (bytes--) { + limit = SSP_FLUSH_NUM; + pss->write(pss); + while ((read_SSSR() & SSSR_BSY) && limit--) + udelay(1); + pss->read(pss); + } + + done: + if (flags & SPI_XFER_END) { + /* Stop SSP */ + write_SSSR(pss->clear_sr); + write_SSCR1(read_SSCR1() & ~pss->int_cr1); + write_SSTO(0); + spi_cs_deactivate(slave); + } + + return ret; +} diff --git a/include/configs/gplugd.h b/include/configs/gplugd.h index d2b91d7..f0fb057 100644 --- a/include/configs/gplugd.h +++ b/include/configs/gplugd.h @@ -83,6 +83,31 @@ #define CONFIG_ROOTPATH "/tftpboot" #define CONFIG_SYS_IMG_NAME "uImage" +/* Flash support */ +#define CONFIG_PXA3XX_SPI + +#define CONFIG_ENV_IS_IN_SPI_FLASH +#define CONFIG_ENV_SECT_SIZE 0x4000 +#define CONFIG_ENV_SIZE 0x4000 +#define CONFIG_ENV_OFFSET 0x07C000 + +#if defined(CONFIG_PXA3XX_SPI) +#define CONFIG_PXA3xx +#define CONFIG_SSP_CLK 6500000 +#define CONFIG_SYS_SSP_BASE 0xD401C000 +#define CONFIG_ENV_SPI_BUS 0 +#define CONFIG_ENV_SPI_CS 110 +#define CONFIG_ENV_SPI_MAX_HZ 26000 +#define CONFIG_ENV_SPI_MODE 0 +#define CONFIG_CMD_SF +#define SF_PROBE_ONCE_FOR_COMMAND +#define CONFIG_PROBE_FLASH_INIT +#define CONFIG_SPI_FLASH_ATMEL 1 +#define CONFIG_CMD_ASKENV +#define CONFIG_CMD_EDITENV +#define CONFIG_CMD_SAVEENV +#endif /*CONFIG_PXA3XX_SPI*/ + /* * mv-common.h should be defined after CMD configs since it used them * to enable certain macros @@ -96,10 +121,5 @@ #define CONFIG_SYS_NS16550_COM1 ARMD1_UART3_BASE -/* - * Environment variables configurations - */ -#define CONFIG_ENV_IS_NOWHERE 1 /* if env in SDRAM */ -#define CONFIG_ENV_SIZE 0x20000 /* 64k */ - #endif /* __CONFIG_GPLUGD_H */ +