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Message-ID: <1343397940-12975-3-git-send-email-sandeep@freescale.com>
Date: Fri, 27 Jul 2012 19:35:40 +0530
From: <sandeep@...escale.com>
To: <linuxppc-dev@...ts.ozlabs.org>,
<linux-arm-kernel@...ts.infradead.org>
CC: <galak@...nel.crashing.org>, <linux-kernel@...r.kernel.org>,
<devel@...verdev.osuosl.org>, Sandeep Singh <Sandeep@...escale.com>
Subject: [3/3][PATCH][v2] Added TDM device support and Freescale Starlite driver
From: Sandeep Singh <Sandeep@...escale.com>
Freescale TDM controller consists of a TDM module supporting 128 channels
running at up to 50 Mbps with 8-bit and 16-bit word size. The TDM bus connects
gluelessly to most T1/E1 frames as well as to common buses such as the H.110,
SCAS, and MVIP. TDM also supports an I2S mode. The TDM module operates in
independent or shared mode when receiving or transmitting data.
This controller is available on MPC8315, P1010, P1020, P1022 and P1024 Freescale SOCs.
The driver registers itself with the TDM Framework & provides TDM functionality to the client modules.
In its present form this driver supports only channelised mode.
Signed-off-by: Sandeep Singh <Sandeep@...escale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@...escale.com>
---
Based on: git://git.am.freescale.net/gitolite/mirrors/galak-powerpc.git
Branch: master
Checkpatch: passed
First patch version was RFC
Changes from RFC:
- Enabling Tx FIFO for TDM
- Removed unused variables.
- PMUXCR has been removed as it is taken care by u-boot
Incorporated Timur's comments:
- Improved Copyright statement.
- Removed unused function.
- Introduced read after each write to register
- Used spin_event_timeout for polling
- Removed unused spinlock
- Moved all macros and structures from header file to tdm_fsl.c
- Rectified cosmetic problems.
drivers/tdm/Kconfig | 3 -
drivers/tdm/Makefile | 2 +-
drivers/tdm/device/Kconfig | 15 +
drivers/tdm/device/Makefile | 9 +
drivers/tdm/device/tdm_fsl.c | 1186 ++++++++++++++++++++++++++++++++++++++++++
5 files changed, 1211 insertions(+), 4 deletions(-)
create mode 100644 drivers/tdm/device/Kconfig
create mode 100644 drivers/tdm/device/Makefile
create mode 100644 drivers/tdm/device/tdm_fsl.c
diff --git a/drivers/tdm/Kconfig b/drivers/tdm/Kconfig
index 0b0fda8..69b8987 100644
--- a/drivers/tdm/Kconfig
+++ b/drivers/tdm/Kconfig
@@ -13,6 +13,3 @@ menuconfig TDM
This TDM support can also be built as a module. If so, the module
will be called tdm-core.
-if TDM
-
-endif # TDM
diff --git a/drivers/tdm/Makefile b/drivers/tdm/Makefile
index 84e2cb9..a605b3d 100644
--- a/drivers/tdm/Makefile
+++ b/drivers/tdm/Makefile
@@ -2,4 +2,4 @@
# Makefile for the TDM core.
#
-obj-$(CONFIG_TDM) += tdm-core.o
+obj-$(CONFIG_TDM) += tdm-core.o device/
diff --git a/drivers/tdm/device/Kconfig b/drivers/tdm/device/Kconfig
new file mode 100644
index 0000000..9fd1b06
--- /dev/null
+++ b/drivers/tdm/device/Kconfig
@@ -0,0 +1,15 @@
+#
+# TDM device configuration
+#
+
+menu "TDM Device support"
+
+config TDM_FSL
+ tristate "Driver for Freescale TDM controller"
+ depends on FSL_SOC
+ ---help---
+ This is a driver for Freescale TDM controller. The controller
+ is found in various Freescale SOCs viz MPC8315, P1020. The TDM driver
+ basically multiplexes and demultiplexes data from different channels.
+ The TDM can interface SLIC kind of devices.
+endmenu
diff --git a/drivers/tdm/device/Makefile b/drivers/tdm/device/Makefile
new file mode 100644
index 0000000..4156d7f
--- /dev/null
+++ b/drivers/tdm/device/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the TDM device drivers.
+#
+
+obj-y += tdm_fsl.o
+
+#ifeq ($(CONFIG_TDM_DEBUG_BUS),y)
+#EXTRA_CFLAGS += -DDEBUG
+#endif
diff --git a/drivers/tdm/device/tdm_fsl.c b/drivers/tdm/device/tdm_fsl.c
new file mode 100644
index 0000000..040b0ea
--- /dev/null
+++ b/drivers/tdm/device/tdm_fsl.c
@@ -0,0 +1,1186 @@
+/*
+ * Copyright 2007-2012 Freescale Semiconductor, Inc, All rights reserved.
+ *
+ * TDM driver for Freescale TDM controller.
+ * This driver can interface with SLIC device to run VOIP kind of
+ * applications.
+ *
+ * Author: P. V. Suresh <pala@...escale.com>
+ * Hemant Agrawal <hemant@...escale.com>
+ * Rajesh Gumasta <rajesh.gumasta@...escale.com>
+ *
+ * Modifier: Sandeep Kr. Singh <sandeep@...escale.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ * This 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, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Note that this is a complete rewrite of P.V. Suresh's driver code.
+ * But we have used so much of his original code and ideas that it seems
+ * only fair to recognize him as co-author -- Rajesh & Hemant
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of_platform.h>
+#include <linux/io.h>
+#include <linux/tdm.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/dma-mapping.h>
+#include <linux/spinlock.h>
+#include <sysdev/fsl_soc.h>
+
+#define DRV_DESC "Freescale TDM Driver Adapter"
+#define DRV_NAME "fsl_tdm"
+
+/* TDM data register offset */
+#define TDM_TDR_OFFSET 0x108
+#define TDM_RDR_OFFSET 0x100
+#define TDM_DATAREG_OFFSET 0x100
+#define TDM_CLKREG_OFFSET 0x180
+
+/* TCD params */
+#define SOFF_VAL 0x08
+#define DOFF_VAL 0x08
+#define NBYTES 0x08 /*Minor Bytes transfer count*/
+#define SLAST 0x00 /* last source addr adjustment*/
+#define SLAST_SGA 0x00
+#define DLAST_SGA 0x00
+
+/* RIR Params*/
+#define RIR_RFSD_VAL 0x01
+#define RIR_RFWM_VAL 0x00
+
+/* TIR Params*/
+#define TIR_RFSD_VAL 0x01
+#define TIR_RFWM_VAL 0x00
+
+/* TDMTCEN */
+#define NUM_TDMTCEN_REG 0x04
+#define TDMTCEN_REG_LEN 32
+
+
+#define DMAC_TX_INT 1
+#define DMAC_RX_INT 2
+
+/* DMA GPOR */
+#define DMAGPOR_SNOOP 0x00000040 /* Enable Snooping */
+
+/* DMA Control Register (DMACR) */
+#define DMACR_EMLM 0x00000080 /* Enable Minor loop Mapping */
+#define DMACR_CLM 0x00000040 /* Continuous link mode */
+#define DMACR_HALT 0x00000020 /* Halt DMA */
+#define DMACR_HOE 0x00000010 /* Halt on Error */
+#define DMACR_ERGA 0x00000008 /* Round robin among the groups */
+#define DMACR_ERCA 0x00000004 /* Round robin Port Arbitration */
+#define DMACR_EDBG 0x00000002 /* Debug */
+#define DMACR_EBW 0x00000001 /* Enable Buffer */
+
+/* DMA Error Status DMAES */
+#define DMAES_VLD 0x80000000 /* Logical OR of all DMA errors. */
+#define DMAES_ECX 0x00010000 /* Transfer cancelled */
+#define DMAES_GPE 0x00008000 /* Group priority error */
+#define DMAES_CPE 0x00004000 /* Channel priority error */
+/* errored/cancelled channel */
+#define DMAES_ERRCHN(errch) (((errch) & 0x1F00) >> 8)
+#define DMAES_SAE 0x00000080 /* Source address error */
+#define DMAES_SOE 0x00000040 /* Source offset error */
+#define DMAES_DAE 0x00000020 /* Destination address error */
+#define DMAES_DOE 0x00000010 /* Destination offset error */
+#define DMAES_NCE 0x00000008 /* Nbytes citer error */
+#define DMAES_SGE 0x00000004 /* Scatter gather error */
+#define DMAES_SBE 0x00000002 /* Source bus error */
+#define DMAES_DBE 0x00000001 /* Destination bus error */
+
+/* DMA Enable Request (DMAERQH, DMAERQL) Enable/disable device
+ request for the channel */
+#define DMA_SET_ENABLE_REQUEST(regs, ch) out_8(((regs)->dmasreq), ch)
+#define DMA_CLEAR_ENABLE_REQUEST(regs, ch) out_8(((regs)->dmacerq), ch)
+
+/* DMA Enable Error Interrupt (DMAEEIH, DMAEEIL) Enable/disable
+ error interrupt for the channel */
+#define DMA_SET_ENABLE_ERROR_INT(regs, ch) out_8(((regs)->dmaseei), ch)
+#define DMA_CLEAR_ENABLE_ERROR_INT(regs, ch) out_8(((regs)->dmaceei), ch)
+
+/* Clear interrupt/error for the channel */
+#define DMA_CLEAR_INTT_REQUEST(regs, ch) out_8(((regs)->dmacint), ch)
+#define DMA_CLEAR_ERROR(regs, ch) out_8(((regs)->dmacerr), ch)
+
+/* Clear done bit for the channel */
+#define DMA_CLEAR_DONE_BIT(regs, ch) out_8(((regs)->dmacdne), ch)
+/* Set start bit for the channel */
+#define DMA_SET_START_BIT(regs, ch) out_8(((regs)->dmassrt), ch)
+
+#define TDMTX_DMA_CH 0 /* TDM Tx uses DMA channel 0 HardWired */
+#define TDMRX_DMA_CH 1 /* TDM Rx uses DMA channel 1 Hardwired */
+#define TCD_SIZE 64 /* 64 byte buffer for TCD */
+
+/* Source address modulo */
+#define DMA_TCD1_SMOD(smod) (((smod) & 0x1F) << 27)
+/* Source data transfer size */
+#define DMA_TCD1_SSIZE(ssize) (((ssize) & 0x7) << 24)
+
+/* Destination address modulo */
+#define DMA_TCD1_DMOD(dmod) (((dmod) & 0x1F) << 19)
+/* data transfer size */
+#define DMA_TCD1_DSIZE(dsize) (((dsize) & 0x7) << 16)
+
+/* Source address signed offset */
+#define DMA_TCD1_SOFF(soff) ((soff) & 0xFFFF)
+
+/* Enable link to another channel on minor iteration completion. */
+#define DMA_TCD5_E_MINOR_LINK 0x80000000
+/* Link to this channel. */
+#define DMA_TCD5_LINK_CH(ch) (((ch) & 0x3F) << 25)
+/* Current iteration count when linking disnabled */
+#define DMA_TCD5_CITER_DISABLE_LINK(citer) (((citer) & 0x7FFF) << 16)
+/* Current iteration count when linking enabled */
+#define DMA_TCD5_CITER_ENABLE_LINK(citer) (((citer) & 0x00FF) << 16)
+/* Destination address signed offset */
+#define DMA_TCD5_DOFF(doff) ((doff) & 0xFFFF)
+
+/* Beginning iteration count when linking disabled */
+#define DMA_TCD7_BITER_DISABLE_LINK(citer) (((citer) & 0x7FFF) << 16)
+/* Beginning iteration count when linking enabled */
+#define DMA_TCD7_BITER_ENABLE_LINK(citer) (((citer) & 0x00FF) << 16)
+#define DMA_TCD7_BWC(bw) (((bw)&0x3)<<14) /* BandWidth Control. */
+/* Link channel number */
+#define DMA_TCD7_LINKCH(ch) (((ch) & 0x1F) << 8)
+#define DMA_TCD7_DONE 0x00000080 /* Channel done */
+#define DMA_TCD7_ACTIVE 0x00000040 /* Channel active */
+#define DMA_TCD7_E_MAJOR_LINK 0x00000020 /* channel to channel linking */
+#define DMA_TCD7_E_SG 0x00000010 /* Enable scatter gather */
+#define DMA_TCD7_D_REQ 0x00000008 /* Disable request */
+/* interrupt on half major counter */
+#define DMA_TCD7_INT_HALF 0x00000004
+#define DMA_TCD7_INT_MAJ 0x00000002 /* interrupt on major counter */
+#define DMA_TCD7_START 0x00000001 /* Channel start */
+
+/* Source data transfer size */
+#define SSIZE_08BITS 0x00
+#define SSIZE_16BITS 0x01
+#define SSIZE_32BITS 0x02
+#define SSIZE_64BITS 0x03
+
+/* max number of TDM-DMA channels */
+#define DMA_MAX_CHANNELS 4
+
+/* each DMA-ch contains 8 Transfer Control Discriptors */
+#define MAX_TCD_WORD 8
+
+/* TDMGIR General Interface Register */
+#define GIR_LPBK 0x00000004 /* loopback mode */
+#define GIR_CTS 0x00000002 /* Common TDM signals */
+#define GIR_RTS 0x00000001 /* Rx & Tx sharing */
+
+/* TDMRIR Recieve Interface Rgister */
+#define RIR_RFWM_MASK 0x00000003 /* Recieve FIFO Watermark */
+#define RIR_RFWM_SHIFT 16
+#define RIR_RFWM(x) ((x & RIR_RFWM_MASK) << RIR_RFWM_SHIFT)
+#define RIR_RFEN 0x00008000 /* Recieve FIFO Enable */
+#define RIR_RWEN 0x00004000 /* Recieve Wide FIFO Enable */
+#define RIR_RDMA 0x00000040 /* Recieve DMA Enable */
+#define RIR_RFSD_SHIFT 0x00000004 /* Recieve Frame Sync Delay */
+#define RIR_RFSD_MASK 0x00000003
+#define RIR_RFSD(x) ((x & RIR_RFSD_MASK) << RIR_RFSD_SHIFT)
+#define RIR_RSO 0x00002000 /* Recieve sync Out */
+#define RIR_RSL 0x00000800 /* Recieve sync Out Length */
+#define RIR_RSOE 0x00000400 /* Recieve sync Out Edge */
+#define RIR_RCOE 0x00000200 /* Recieve Clock Output Enable */
+#define RIR_RSA 0x00000008 /* Recieve Sync Active */
+#define RIR_RDE 0x00000004 /* Recieve Data Edge */
+#define RIR_RFSE 0x00000002 /* Recieve Frame Sync Edge */
+#define RIR_RRDO 0x00000001 /* Revieve Reversed Data Order */
+
+/* TDMTIR Transmit Interface Rgister */
+#define TIR_TFWM_MASK 0x00000003 /* Transmit FIFO Watermark */
+#define TIR_TFWM_SHIFT 16
+#define TIR_TFWM(x) ((x & TIR_TFWM_MASK) << TIR_TFWM_SHIFT)
+#define TIR_TFEN 0x00008000 /* Transmit FIFO Enable */
+#define TIR_TWEN 0x00004000 /* Transmit Wide FIFO Enable */
+#define TIR_TDMA 0x00000040 /* Transmit DMA Enable */
+#define TIR_TFSD_SHIFT 0x00000004 /* Transmit Frame Sync Delay */
+#define TIR_TFSD_MASK 0x00000003
+#define TIR_TFSD(x) ((x & TIR_TFSD_MASK) << TIR_TFSD_SHIFT)
+#define TIR_TSO 0x00002000 /* Transmit Sync Output */
+#define TIR_TSL 0x00000800 /* Transmit sync Out Length */
+#define TIR_TSOE 0x00000400 /* Transmit sync Out Edge */
+#define TIR_TCOE 0x00000200 /* Transmit Clock Output Enable */
+#define TIR_TSA 0x00000008 /* Transmit Sync Active */
+#define TIR_TDE 0x00000004 /* Transmit Data Edge */
+#define TIR_TFSE 0x00000002 /* Transmit Frame Sync Edge */
+#define TIR_TRDO 0x00000001 /* Transmit Reversed Data Order */
+
+/*TDMRFP Revieve Frame Parameters */
+#define RFP_RNCF_SHIFT 0x00000010 /* Number of Channels in TDM Frame */
+#define RFP_RNCF_MASK 0x000000FF
+#define RFP_RNCF(x) (((x - 1) & RFP_RNCF_MASK) << RFP_RNCF_SHIFT)
+#define RFP_RCS_SHIFT 0x00000004 /* Recieve Channel Size */
+#define RFP_RCS_MASK 0x00000003
+#define RFP_RCS(x) ((x & RFP_RCS_MASK) << RFP_RCS_SHIFT)
+#define RFP_RT1 0x00000002 /* Recieve T1 Frame */
+
+/*TDMTFP Transmit Frame Parameters */
+#define TFP_TNCF_SHIFT 0x00000010 /* Number of Channels in TDM Frame */
+#define TFP_TNCF_MASK 0x000000FF
+#define TFP_TNCF(x) (((x - 1) & TFP_TNCF_MASK) << TFP_TNCF_SHIFT)
+#define TFP_TCS_SHIFT 0x00000004 /* Transmit Channel Size */
+#define TFP_TCS_MASK 0x00000003
+#define TFP_TCS(x) ((x & RFP_RCS_MASK) << RFP_RCS_SHIFT)
+#define TFP_TT1 0x00000002 /* Transmit T1 Frame */
+
+
+/* TDMRCR Recieve Control Register */
+#define RCR_REN 0x00000001 /* Recieve Enable */
+/* TDMTCR Transmit Control Register */
+#define TCR_TEN 0x00000001 /* Transmit Enable */
+
+/* TDMRIER receive interrupt enable register */
+#define RIER_RCEUE 0x00000100 /* Channel Enable Update Enable */
+#define RIER_RLCEE 0x00000080 /* Recieve Last Channel Event Enable */
+#define RIER_RFSEE 0x00000040 /* Recieve Frame Sync Event Enable */
+#define RIER_RFFEE 0x00000020 /* Recieve FIFO Full Event Enable */
+#define RIER_RDREE 0x00000010 /* Recieve Data Ready Event Enable */
+#define RIER_RSEEE 0x00000008 /* Recieve Sync Error Event Enable */
+#define RIER_ROEE 0x00000004 /* Recieve Overrun Event Enable */
+
+/* TDMTIER transmit interrupt enable register */
+#define TIER_TCEUE 0x00000100 /* Channel Enable Update Enable */
+#define TIER_TLCEE 0x00000080 /* Transmit Last Channel Event */
+#define TIER_TFSEE 0x00000040 /* Transmit Frame Sync Event Enable */
+#define TIER_TFFEE 0x00000020 /* Transmit FIFO Full Event Enable */
+#define TIER_TDREE 0x00000010 /* Transmit Data Ready Event Enable */
+#define TIER_TSEEE 0x00000008 /* Transmit Sync Error Event Enable */
+#define TIER_TUEE 0x00000004 /* Transmit Overrun Event Enable */
+
+/* TDMRER Recieve Event Register */
+#define RER_RCEU 0x00000100 /* Recieve Channel Enable Update */
+#define RER_RLCE 0x00000080 /* Recieve Last Channel Event */
+#define RER_RFSE 0x00000040 /* Recieve Frame Sync Event */
+#define RER_RFFE 0x00000020 /* Recieve FIFO Full Event */
+#define RER_RDRE 0x00000010 /* Recieve Data Ready Event */
+#define RER_RSEE 0x00000008 /* Recieve Sync Error Event */
+#define RER_ROE 0x00000004 /* Recieve Overrun Event */
+
+/* TDMTER Transmit Event Register */
+#define TER_TCEU 0x00000100 /* Transmit Channel Enable Update */
+#define TER_TLCE 0x00000080 /* Transmit Last Channel Event */
+#define TER_TFSE 0x00000040 /* Transmit Frame Sync Event */
+#define TER_TFEE 0x00000020 /* Transmit FIFO Full Event */
+#define TER_TDRE 0x00000010 /* Transmit Data Ready Event */
+#define TER_TSEE 0x00000008 /* Transmit Sync Error Event */
+#define TER_TUE 0x00000004 /* Transmit Overrun Event */
+
+/* TDMRSR Recieve Status Register */
+#define RSR_RFCNT 0x00000038 /* Recieve FIFO counter */
+#define RSSS_MASK 0x00000003 /* Recieve SYNC Status */
+#define RSR_RSSS_SHIFT 1
+#define RSR_RSSS(sss) (((sss) >> (RSR_RSSS_SHIFT)) & (RSR_RSSS_MASK))
+#define RSR_RENS 0x00000001 /* Recieve Enable Status */
+
+/* TDMTSR Transmit Status Register */
+#define TSR_TFCNT 0x00000038 /* Transmit FIFO counter */
+#define TSR_TSSS_MASK 0x00000003 /* Transmit SYNC Status */
+#define TSR_TSSS_SHIFT 1
+#define TSR_TSSS(sss) (((sss) >> (TSR_TSSS_SHIFT)) & TSR_TSSS_MASK)
+#define TSR_TENS 0x00000001 /* Transmit Enable Status */
+
+
+/* channel parameters */
+#define TDM_ENABLE_TIMEOUT 1000 /* time out for TDM rx, tx enable */
+#define NUM_OF_TDM_BUF 3 /* Number of tdm buffers for startlite
+ DMA */
+#define ALIGNED_2_BYTES 0x02 /* 2-bytes alignment */
+#define ALIGNED_4_BYTES 0x04 /* 4-bytes alignment */
+#define ALIGNED_8_BYTES 0x08 /* 8-bytes alignment */
+#define ALIGNED_16_BYTES 0x10 /* 16-bytes alignment */
+#define ALIGNED_32_BYTES 0x20 /* 32-bytes alignment */
+#define ALIGNED_64_BYTES 0x40 /* 64-bytes alignment */
+
+static int tdmen = 1;
+
+module_param(tdmen, int, S_IRUSR);
+MODULE_PARM_DESC(tdmen, "Enable TDM: Enable=1, Disable=0(default)");
+
+/* DMAC TCD structure */
+struct tcd {
+ u32 tcd[MAX_TCD_WORD];
+};
+
+/* DMA Controllor */
+struct dmac_regs {
+ u32 dmacr; /* DMA Control Register */
+ u32 dmaes; /* DMA Error Status Register */
+ u32 dmaerqh; /* DMA Enable Request */
+ u32 dmaerql; /* DMA Enable Request */
+ u32 dmaeeih; /* DMA Enable Error Interrupt */
+ u32 dmaeeil; /* DMA Enable Error Interrupt */
+
+ u8 dmaserq; /* DMA Set Enable Request */
+ u8 dmacerq; /* DMA Clear Enable Request */
+ u8 dmaseei; /* DMA Set Enable Error Interrupt */
+ u8 dmaceei; /* DMA Clear Enable Error Interrupt */
+
+ u8 dmacint; /* DMA Clear Interrupt Request */
+ u8 dmacerr; /* DMA Clear Error */
+ u8 dmassrt; /* DMA Set Start Bit */
+ u8 dmacdne; /* DMA Clear Done Bit */
+
+ u32 dmainth; /* DMA Interrupt Request High */
+ u32 dmaintl; /* DMA Interrupt Request */
+ u32 dmaerrh; /* DMA Error */
+ u32 dmaerrl; /* DMA Error */
+ u32 dmahrsh; /* DMA Hardware Request status */
+ u32 dmahrsl; /* DMA HardWired Request status */
+ u32 dmagpor; /* DMA General Purpose Register */
+ u8 reserved0[0xC4];
+ u8 dchpri[DMA_MAX_CHANNELS]; /* DMA Port Priority */
+ u8 reserved1[0xEFC];
+ struct tcd tcd[DMA_MAX_CHANNELS]; /*Transfer Control Descriptor */
+};
+
+/* TDM Control Registers. */
+struct tdm_regs {
+ u32 gir; /* General Interface Register */
+ u32 rir; /* Receive Interface Register */
+ u32 tir; /* Transmit Interface Register */
+ u32 rfp; /* Receive Frame Parameters */
+ u32 tfp; /* Transmit Frame Parameters */
+ u8 reserved0[0xC];
+ u32 rcen[4]; /* Recieve Channel Enabled */
+ u8 reserved1[0x10];
+ u32 tcen[4]; /* Transmit Channel Enabled */
+ u8 reservedd2[0x10];
+ u32 tcma[4]; /* Transmit Channel Mask */
+ u8 reservederved3[0x10];
+ u32 rcr; /* Receiver Control Register */
+ u32 tcr; /* Transmitter Control Register */
+ u32 rier; /* Receive Interrupt Enable Register */
+ u32 tier; /* Transmit Interrupt Enable Register */
+ u8 reserved4[0x10];
+ u32 rer; /* Receive Event Register */
+ u32 ter; /* Transmit Event Register */
+ u32 rsr; /* Receive Status Register */
+ u32 tsr; /* Transmit Status Register */
+};
+
+struct tdm_data {
+ u64 rdr; /* Receive Data Register */
+ u64 tdr; /* Transmit Dataa Register */
+};
+
+struct tdm_clock {
+ u32 rx; /* Transmit Dataa Register */
+ u32 tx; /* Receive Data Register */
+};
+
+
+struct tdm_priv {
+ struct tdm_regs __iomem *tdm_regs;
+ struct tdm_data __iomem *data_regs;
+ struct dmac_regs __iomem *dmac_regs;
+ struct tdm_clock __iomem *clk_regs;
+ u32 ptdm_base;
+ u8 *tdm_input_data;
+ u8 *tdm_output_data;
+ dma_addr_t dma_input_paddr; /* dma mapped buffer for TDM Rx */
+ dma_addr_t dma_output_paddr; /* dma mapped buffer for TDM Tx */
+ void *dma_input_vaddr;
+ void *dma_output_vaddr;
+ u32 phase_rx;
+ u32 phase_tx;
+ struct tcd *dma_rx_tcd[NUM_OF_TDM_BUF];
+ struct tcd *dma_tx_tcd[NUM_OF_TDM_BUF];
+ dma_addr_t dma_rx_tcd_paddr;
+ dma_addr_t dma_tx_tcd_paddr;
+ void *dma_rx_tcd_vaddr;
+ void *dma_tx_tcd_vaddr;
+ u32 tdm_buffer_size;
+ u32 tdm_err_intr;
+ u32 dmac_err_intr;
+ u32 dmac_done_intr;
+ int tdm_active;
+ struct device *device;
+ spinlock_t tdmlock;
+ struct tdm_adapter *adap;
+};
+
+/* Extend a given size to make it alignable */
+static inline int ALIGNABLE_SIZE(u32 size, u32 alignment)
+{
+ return size + alignment - 1;
+}
+
+/* Align a given address */
+static inline void *ALIGN_ADDRESS(void *address, u32 alignment)
+{
+ return (void *)(((unsigned long) address + alignment - 1) &
+ (~(alignment - 1)));
+}
+
+/* Size of the buffer */
+static inline int TDM_1BUF_SIZE(u32 num_ch, u32 channel_size, u32 frame_size)
+{
+ return frame_size *
+ ALIGN(channel_size * num_ch, ALIGNED_8_BYTES);
+}
+
+/* Alignable size of the 3 buffers */
+static inline int TDM_3BUF_SIZE(u32 num_ch, u32 channel_size, u32 frame_size)
+{
+ return
+ ALIGNABLE_SIZE((TDM_1BUF_SIZE(num_ch, channel_size, frame_size) *
+ NUM_OF_TDM_BUF), ALIGNED_8_BYTES);
+}
+
+
+
+/* Initialize the Tx Transmit Control Descriptor parameters*/
+static void tx_tcd_init(struct tdm_priv *priv)
+{
+ int i;
+ u32 iter;
+ u32 offset;
+ dma_addr_t physaddr;
+ struct tdm_adapter *adap;
+ int bytes_in_fifo_per_frame;
+ adap = priv->adap;
+
+ if (!adap) {
+ dev_err(priv->device, "%s:Invalid handle\n", __func__);
+ return;
+ }
+ bytes_in_fifo_per_frame =
+ ALIGN(adap->adapt_cfg.num_ch * adap->adapt_cfg.slot_width, 8);
+
+ iter = (bytes_in_fifo_per_frame / NBYTES) * adap->adapt_cfg.num_frames;
+
+ for (i = 0; i < NUM_OF_TDM_BUF; i++) {
+ offset = i * adap->adapt_cfg.num_frames *
+ bytes_in_fifo_per_frame;
+ /* TCD word 0: source addr */
+ priv->dma_tx_tcd[i]->tcd[0] = (u32)priv->dma_output_paddr
+ + offset;
+
+ /* TCD word 1: ssize=dsize=64bit, soff=8, smod=dmod=0 */
+ priv->dma_tx_tcd[i]->tcd[1] =
+ DMA_TCD1_SOFF(SOFF_VAL) | DMA_TCD1_SSIZE(SSIZE_64BITS) |
+ DMA_TCD1_DSIZE(SSIZE_64BITS);
+
+ /*
+ * TCD word 2: number of bytes for minor loop, wide fifo
+ * 8 bytes for dma
+ */
+ priv->dma_tx_tcd[i]->tcd[2] = NBYTES;
+
+ /* TCD word 3: last source addr adjustment = 0 */
+ priv->dma_tx_tcd[i]->tcd[3] = SLAST;
+
+ /* TCD word 4: destination addr */
+ priv->dma_tx_tcd[i]->tcd[4] = TDM_TDR_OFFSET + priv->ptdm_base;
+
+ /*
+ * channel to channel linking is disabled ,
+ * destination offset is inc destination adr by 8,
+ * current iteration(citer) = number of transfers for frame
+ */
+ /* TCD word 5: citer count, dest addr offset */
+ priv->dma_tx_tcd[i]->tcd[5] = DMA_TCD5_CITER_DISABLE_LINK(iter);
+
+ /* TCD word 6: enable scater gather, interrupt on 1 Frame, */
+ priv->dma_tx_tcd[i]->tcd[6] = SLAST_SGA;
+
+ /*
+ * TCD word 7: begining major iteration count(biter),
+ * channel control/status
+ */
+ priv->dma_tx_tcd[i]->tcd[7] =
+ DMA_TCD7_BITER_DISABLE_LINK(iter) | DMA_TCD7_E_SG;
+ }
+
+ /* Linking the TCDs togather for SG operation */
+ physaddr = priv->dma_tx_tcd_paddr;
+ priv->dma_tx_tcd[2]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+ physaddr += TCD_SIZE;
+ priv->dma_tx_tcd[0]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+ physaddr += TCD_SIZE;
+ priv->dma_tx_tcd[1]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+}
+
+/* Initialize the Rx Transmit Control Discriptor parameters */
+static void rx_tcd_init(struct tdm_priv *priv)
+{
+ int i;
+ u32 iter;
+ u32 offset;
+ dma_addr_t physaddr;
+ struct tdm_adapter *adap;
+ int bytes_in_fifo_per_frame;
+ adap = priv->adap;
+ bytes_in_fifo_per_frame =
+ ALIGN(adap->adapt_cfg.num_ch * adap->adapt_cfg.slot_width, 8);
+
+ iter = (bytes_in_fifo_per_frame / NBYTES) * adap->adapt_cfg.num_frames;
+
+ for (i = 0; i < NUM_OF_TDM_BUF; i++) {
+ /* TCD word 0: source addr */
+ priv->dma_rx_tcd[i]->tcd[0] = TDM_RDR_OFFSET + priv->ptdm_base;
+
+ /* TCD word 1: ssize=dsize=64bit, soff=smod=dmod=0 */
+ priv->dma_rx_tcd[i]->tcd[1] =
+ DMA_TCD1_SSIZE(SSIZE_64BITS) |
+ DMA_TCD1_DSIZE(SSIZE_64BITS);
+
+ /*
+ * TCD word 2: number of bytes for minor loop,
+ * wide fifo 8 bytes for dma
+ */
+ priv->dma_rx_tcd[i]->tcd[2] = NBYTES;
+
+ /* TCD word 3: last source addr adjustment = 0 */
+ priv->dma_rx_tcd[i]->tcd[3] = SLAST;
+
+ offset = i * adap->adapt_cfg.num_frames *
+ bytes_in_fifo_per_frame;
+
+ /* TCD word 4: destination addr */
+ priv->dma_rx_tcd[i]->tcd[4] = (u32)priv->dma_input_paddr
+ + offset;
+
+ /*
+ * channel to channel linking is disabled ,
+ * destination offset is inc destination adr by 8,
+ * current iteration(citer) = number of transfers for frame
+ */
+ /* TCD word 5: citer count, dest addr offset */
+ priv->dma_rx_tcd[i]->tcd[5] =
+ DMA_TCD5_DOFF(DOFF_VAL) |
+ DMA_TCD5_CITER_DISABLE_LINK(iter);
+
+ /* TCD word 6: enable scater gather, interrupt on 1 Frame, */
+ priv->dma_rx_tcd[i]->tcd[6] = DLAST_SGA;
+
+ /*
+ * TCD word 7: begining major iteration count(biter),
+ * channel control/status
+ */
+ priv->dma_rx_tcd[i]->tcd[7] =
+ DMA_TCD7_BITER_DISABLE_LINK(iter) | DMA_TCD7_E_SG |
+ DMA_TCD7_INT_MAJ;
+ }
+
+ /* Next TCD for SG operation */
+ physaddr = priv->dma_rx_tcd_paddr;
+ priv->dma_rx_tcd[2]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+ physaddr += TCD_SIZE;
+ priv->dma_rx_tcd[0]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+ physaddr += TCD_SIZE;
+ priv->dma_rx_tcd[1]->tcd[6] = ALIGN(physaddr, ALIGNED_32_BYTES);
+}
+
+static irqreturn_t dmac_done_isr(int irq, void *p)
+{
+ u32 ch;
+ int ret = IRQ_NONE;
+ struct tdm_priv *priv;
+
+ priv = p;
+
+ ch = in_be32(&priv->dmac_regs->dmaintl);
+
+ /* clear interrupt */
+ if (ch & DMAC_RX_INT) {
+ out_8(&priv->dmac_regs->dmacint, TDMRX_DMA_CH);
+ ret = IRQ_HANDLED;
+ /* track phases for Rx/Tx */
+ priv->phase_rx += 1;
+ if (priv->phase_rx == NUM_OF_TDM_BUF)
+ priv->phase_rx = 0;
+ }
+ if (ch & DMAC_TX_INT) {
+ out_8(&priv->dmac_regs->dmacint, TDMTX_DMA_CH);
+ ret = IRQ_HANDLED;
+ }
+
+ if (ret == IRQ_HANDLED) {
+ /* set the flag and wake up the thread */
+ priv->adap->tdm_rx_flag = 1;
+
+ /* schedule the tasklet */
+ if (priv->adap->tasklet_conf)
+ tasklet_schedule(&priv->adap->tdm_data_tasklet);
+ }
+ return ret;
+}
+
+static int init_tdm(struct tdm_priv *priv)
+{
+ u8 *buf;
+ int i;
+ int buf_size;
+ dma_addr_t physaddr = 0;
+ int ret = 0;
+ struct tdm_adapter *adap;
+
+
+ adap = priv->adap;
+
+ /*
+ * Allocate memory for Rx/Tx buffer according to active time slots
+ * BufferSize = NUM_OF_TDM_BUF * NUM_SAMPLES_PER_FRAME * slot_width *
+ * num_ch
+ */
+ /*Allocating Rx Buffer*/
+ buf_size = TDM_3BUF_SIZE(adap->adapt_cfg.num_ch,
+ adap->adapt_cfg.slot_width,
+ adap->adapt_cfg.num_frames);
+ buf = dma_alloc_coherent(priv->device, buf_size, &physaddr, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_alloc_ip;
+ }
+ priv->dma_input_paddr = physaddr;
+ priv->dma_input_vaddr = buf;
+ priv->tdm_input_data = ALIGN_ADDRESS(buf, ALIGNED_8_BYTES);
+
+ buf = dma_alloc_coherent(priv->device, buf_size, &physaddr, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_alloc_op;
+ }
+ priv->dma_output_paddr = physaddr;
+ priv->dma_output_vaddr = buf;
+ priv->tdm_output_data = ALIGN_ADDRESS(buf, ALIGNED_8_BYTES);
+
+ /* allocate memory for TCD buffer descriptors */
+ buf = dma_alloc_coherent(priv->device, NUM_OF_TDM_BUF * TCD_SIZE,
+ &physaddr, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_alloc_rx;
+ }
+
+ memset(buf, 0, NUM_OF_TDM_BUF * TCD_SIZE);
+ priv->dma_rx_tcd_paddr = physaddr;
+ priv->dma_rx_tcd_vaddr = buf;
+ for (i = 0; i < NUM_OF_TDM_BUF; i++) {
+ priv->dma_rx_tcd[i] = ALIGN_ADDRESS(buf, ALIGNED_32_BYTES);
+ buf += TCD_SIZE;
+ }
+
+ buf = dma_alloc_coherent(priv->device, 3 * TCD_SIZE, &physaddr,
+ GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_alloc_tx;
+ }
+ memset(buf, 0, NUM_OF_TDM_BUF * TCD_SIZE);
+ priv->dma_tx_tcd_paddr = physaddr;
+ priv->dma_tx_tcd_vaddr = buf;
+ for (i = 0; i < NUM_OF_TDM_BUF; i++) {
+ priv->dma_tx_tcd[i] = ALIGN_ADDRESS(buf, ALIGNED_32_BYTES);
+ buf += TCD_SIZE;
+ }
+
+ priv->phase_rx = 0;
+ priv->phase_tx = 0;
+ return 0;
+
+err_alloc_tx:
+ dma_free_coherent(priv->device, NUM_OF_TDM_BUF * TCD_SIZE,
+ priv->dma_rx_tcd_vaddr, priv->dma_rx_tcd_paddr);
+err_alloc_rx:
+ dma_free_coherent(priv->device, buf_size, priv->dma_output_vaddr,
+ priv->dma_output_paddr);
+err_alloc_op:
+ dma_free_coherent(priv->device, buf_size, priv->dma_input_vaddr,
+ priv->dma_input_paddr);
+err_alloc_ip:
+ return ret;
+}
+
+/* TDM register programming */
+static int tdm_fsl_reg_init(struct tdm_priv *priv)
+{
+ int i;
+ int ch_size_type;
+ struct tdm_adapter *adap;
+
+ if (!priv) {
+ pr_err("%s: Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+ adap = priv->adap;
+
+ /* channel/group round robin */
+ out_be32(&priv->dmac_regs->dmacr, DMACR_ERGA | DMACR_ERCA);
+ /* Enable error Interrupts for TDM Rx &Tx */
+ out_8(&priv->dmac_regs->dmaseei, TDMTX_DMA_CH);
+ in_8(&priv->dmac_regs->dmaseei);
+ out_8(&priv->dmac_regs->dmaseei, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmaseei);
+ out_be32(&priv->dmac_regs->dmagpor, DMAGPOR_SNOOP);
+
+ tx_tcd_init(priv);
+ rx_tcd_init(priv);
+
+ /* TDM RD->TD loopback, Share T/R Fsync,Clock */
+ if (adap->adapt_cfg.loopback)
+ out_be32(&priv->tdm_regs->gir, GIR_LPBK | GIR_RTS);
+ else
+ out_be32(&priv->tdm_regs->gir, GIR_RTS);
+
+ /*
+ * Rx Water mark 0, FIFO enable, Wide fifo, DMA enable for RX,
+ * Receive Sync out, syncwidth = ch width, Rx clk out,zero sync,
+ * falling edge , data order
+ */
+
+ out_be32(&priv->tdm_regs->rir,
+ RIR_RFWM(RIR_RFWM_VAL) | RIR_RFEN | RIR_RWEN |
+ RIR_RDMA | RIR_RSL | RIR_RSO | RIR_RCOE | RIR_RRDO |
+ RIR_RFSD(RIR_RFSD_VAL));
+ out_be32(&priv->tdm_regs->tir,
+ TIR_TFWM(TIR_RFWM_VAL) | TIR_TFEN | TIR_TWEN |
+ TIR_TDMA | TIR_TSL | TIR_TSO | TIR_TRDO |
+ TIR_TFSD(TIR_RFSD_VAL));
+
+ /* no of channels ,Channel size-coading */
+ switch (adap->adapt_cfg.ch_size_type) {
+ case CHANNEL_8BIT_LIN:
+ ch_size_type = CHANNEL_8BIT_LIN;
+ break;
+ case CHANNEL_8BIT_ULAW:
+ ch_size_type = CHANNEL_8BIT_ULAW;
+ break;
+ case CHANNEL_8BIT_ALAW:
+ ch_size_type = CHANNEL_8BIT_ALAW;
+ break;
+ case CHANNEL_16BIT_LIN:
+ ch_size_type = CHANNEL_16BIT_LIN;
+ break;
+ default:
+ dev_err(priv->device, "%s:Invalid channel size_type\n"
+ "Setting channel to default size: 16 bits",
+ __func__);
+ ch_size_type = CHANNEL_16BIT_LIN;
+ }
+ out_be32(&priv->tdm_regs->rfp,
+ RFP_RNCF(adap->adapt_cfg.num_ch) |
+ RFP_RCS(ch_size_type));
+ out_be32(&priv->tdm_regs->tfp,
+ TFP_TNCF(adap->adapt_cfg.num_ch) |
+ TFP_TCS(ch_size_type));
+
+ out_be32(&priv->tdm_regs->rier, 0);
+ out_be32(&priv->tdm_regs->tier, 0);
+
+ /* clear all receive and transmit chs */
+ for (i = 0; i < 4; i++) {
+ out_be32(&priv->tdm_regs->tcma[i], 0);
+ out_be32(&priv->tdm_regs->tcen[i], 0);
+ out_be32(&priv->tdm_regs->rcen[i], 0);
+ }
+
+ return 0;
+
+}
+
+static void tdm_fsl_stop(struct tdm_priv *priv)
+{
+ /* stop the Tx & Rx */
+ out_be32(&priv->tdm_regs->tcr, 0);
+ out_be32(&priv->tdm_regs->rcr, 0);
+
+ /* Clear DMA error Enable Request DMAEEIH/L */
+ out_8(&priv->dmac_regs->dmaceei, TDMTX_DMA_CH);
+ in_8(&priv->dmac_regs->dmaceei);
+ out_8(&priv->dmac_regs->dmaceei, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmaceei);
+ out_8(&priv->dmac_regs->dmacint, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmacint);
+ out_8(&priv->dmac_regs->dmacint, TDMTX_DMA_CH);
+ in_8(&priv->dmac_regs->dmacint);
+
+ /* disable the dma request */
+ out_8(&priv->dmac_regs->dmacerq, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmacerq);
+ out_8(&priv->dmac_regs->dmacerq, TDMTX_DMA_CH);
+}
+
+static int tdm_fsl_disable(struct tdm_adapter *adap)
+{
+ struct tdm_priv *priv;
+
+ priv = adap->data;
+ if (priv->tdm_active == 0) {
+ dev_warn(priv->device, "already Disabled");
+ return 0;
+ }
+
+ spin_lock(&priv->tdmlock);
+ priv->tdm_active = 0;
+ spin_unlock(&priv->tdmlock);
+
+ return 0;
+}
+
+static int tdm_fsl_enable(struct tdm_adapter *adap)
+{
+ int i;
+ u32 ch_enab[NUM_TDMTCEN_REG] = {0};
+ unsigned long timeout;
+ struct tdm_priv *priv;
+ u32 ph;
+
+ priv = adap->data;
+ ph = priv->phase_tx;
+
+ if (priv->tdm_active == 1) {
+ dev_warn(priv->device, "already Enabled");
+ return 0;
+ }
+
+ /* enable the Channels required 0 to number of ch -1 */
+ for (i = 0; i < adap->adapt_cfg.num_ch; i++)
+ ch_enab[i / TDMTCEN_REG_LEN] |= (1 << (i & 0x1F));
+
+ for (i = 0; i < NUM_TDMTCEN_REG; i++) {
+ out_be32(&priv->tdm_regs->rcen[i], ch_enab[i]);
+ out_be32(&priv->tdm_regs->tcen[i], ch_enab[i]);
+ }
+
+ /* Clear the DONE bit */
+ out_8(&priv->dmac_regs->dmacdne, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmacdne);
+ out_8(&priv->dmac_regs->dmacdne, TDMTX_DMA_CH);
+
+ /* Load the Tx transfer control descriptors */
+ for (i = 0; i < MAX_TCD_WORD; i++)
+ out_be32(&priv->dmac_regs->tcd[TDMTX_DMA_CH].tcd[i],
+ priv->dma_tx_tcd[ph]->tcd[i]);
+
+ /* Load the Rx transfer control descriptors */
+ for (i = 0; i < MAX_TCD_WORD; i++)
+ out_be32(&priv->dmac_regs->tcd[TDMRX_DMA_CH].tcd[i],
+ priv->dma_rx_tcd[ph]->tcd[i]);
+
+ /* enable the dma request */
+ out_8(&priv->dmac_regs->dmaserq, TDMRX_DMA_CH);
+ in_8(&priv->dmac_regs->dmaserq);
+ out_8(&priv->dmac_regs->dmaserq, TDMTX_DMA_CH);
+
+ /* Enable Receiver, transmitter */
+ timeout = jiffies + TDM_ENABLE_TIMEOUT;
+ out_be32(&priv->tdm_regs->tcr, TCR_TEN);
+ spin_event_timeout(!(in_be32(&priv->tdm_regs->tsr) & TSR_TENS),
+ timeout, 0);
+
+ timeout = jiffies + TDM_ENABLE_TIMEOUT;
+ out_be32(&priv->tdm_regs->rcr, RCR_REN);
+ spin_event_timeout(!(in_be32(&priv->tdm_regs->rsr) & RSR_RENS),
+ timeout, 0);
+
+ spin_lock(&priv->tdmlock);
+ priv->tdm_active = 1;
+ spin_unlock(&priv->tdmlock);
+
+ return 1;
+}
+
+static int tdm_fsl_read(struct tdm_adapter *adap,
+ u16 **input_tdm_buffer)
+{
+ struct tdm_priv *priv;
+ u32 phase_rx;
+ u32 buf_addr;
+ int bytes_in_fifo_per_frame, buf_size;
+
+ /* point to where to start for the current phase data processing */
+ bytes_in_fifo_per_frame =
+ ALIGN(adap->adapt_cfg.num_ch * adap->adapt_cfg.slot_width, 8);
+
+ priv = adap->data;
+ if (!priv) {
+ pr_err("%s: Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+ if (priv->tdm_active == 0) {
+ dev_warn(priv->device, "TDM is not ready");
+ return 0;
+ }
+
+ if (priv->phase_rx == 0)
+ phase_rx = NUM_OF_TDM_BUF - 1;
+ else
+ phase_rx = priv->phase_rx - 1;
+
+ buf_size = bytes_in_fifo_per_frame * adap->adapt_cfg.num_frames;
+ buf_addr = buf_size * phase_rx;
+ *input_tdm_buffer = (u16 *)(priv->tdm_input_data + buf_addr);
+
+ return buf_size;
+}
+
+static int tdm_fsl_get_write_buf(struct tdm_adapter *adap,
+ u16 **output_tdm_buffer)
+{
+ struct tdm_priv *priv;
+ u32 tmp;
+ u32 phase_tx;
+ u32 buf_addr;
+ int bytes_in_fifo_per_frame, buf_size;
+
+ /* point to where to start for the current phase data processing */
+ bytes_in_fifo_per_frame =
+ ALIGN(adap->adapt_cfg.num_ch * adap->adapt_cfg.slot_width, 8);
+
+ priv = adap->data;
+ if (!priv) {
+ pr_err("%s: Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+ if (priv->tdm_active == 0) {
+ dev_warn(priv->device, "TDM is not ready");
+ return 0;
+ }
+
+ tmp = in_be32(&priv->dmac_regs->tcd[TDMTX_DMA_CH].tcd[0]);
+
+ tmp -= priv->dma_tx_tcd[0]->tcd[0];
+
+ priv->phase_tx = tmp/(bytes_in_fifo_per_frame *
+ adap->adapt_cfg.num_frames);
+
+ if (priv->phase_tx == 0)
+ phase_tx = NUM_OF_TDM_BUF - 1;
+ else
+ phase_tx = priv->phase_tx - 1;
+
+ buf_size = bytes_in_fifo_per_frame * adap->adapt_cfg.num_frames;
+ buf_addr = buf_size * phase_tx;
+ *output_tdm_buffer = (u16 *)(priv->tdm_output_data + buf_addr);
+
+ return buf_size;
+}
+
+static const struct tdm_adapt_algorithm tdm_algo = {
+ .tdm_read = tdm_fsl_read,
+ .tdm_get_write_buf = tdm_fsl_get_write_buf,
+ .tdm_enable = tdm_fsl_enable,
+ .tdm_disable = tdm_fsl_disable,
+};
+
+static struct tdm_adapter tdm_fsl_ops = {
+ .owner = THIS_MODULE,
+ .name = "fsl_tdm",
+ .algo = &tdm_algo,
+};
+
+static int __devinit tdm_fsl_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct tdm_priv *priv;
+ struct resource res;
+
+ priv = kzalloc(sizeof(struct tdm_priv), GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ dev_set_drvdata(&pdev->dev, priv);
+ priv->device = &pdev->dev;
+ ret = of_address_to_resource(pdev->dev.of_node, 0, &res);
+ if (ret) {
+ ret = -EINVAL;
+ goto err_resource;
+ }
+
+ priv->ptdm_base = (u32)res.start;
+ priv->tdm_regs = of_iomap(pdev->dev.of_node, 0);
+ if (!priv->tdm_regs) {
+ ret = -ENOMEM;
+ goto err_tdmregs;
+ }
+
+ priv->dmac_regs = of_iomap(pdev->dev.of_node, 1);
+ if (!priv->dmac_regs) {
+ ret = -ENOMEM;
+ goto err_dmacreg;
+ }
+
+ priv->dmac_done_intr = irq_of_parse_and_map(pdev->dev.of_node, 0);
+ if (priv->dmac_done_intr == NO_IRQ) {
+ ret = -EINVAL;
+ goto err_dmacdone_irqmap;
+ }
+ ret = request_irq(priv->dmac_done_intr, dmac_done_isr, 0,
+ "dmac_done_isr", priv);
+ if (ret)
+ goto err_dmacdoneisr;
+
+ priv->adap = &tdm_fsl_ops;
+
+ /* Wait q initilization */
+ priv->adap->tdm_rx_flag = 0;
+ /* TODO - these should be configured by dts or init time */
+ priv->adap->data = priv;
+ priv->adap->parent = &pdev->dev;
+
+ ret = tdm_add_adapter(priv->adap);
+ if (ret < 0) {
+ dev_err(priv->device, "failed to add adapter\n");
+ goto fail_adapter;
+ }
+
+ /* Device does not supports 36 bit mode */
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+
+ ret = init_tdm(priv);
+ if (ret)
+ goto err_tdminit;
+
+ tdm_fsl_reg_init(priv);
+
+ spin_lock_init(&priv->tdmlock);
+ priv->tdm_active = 0;
+
+ if (tdmen) {
+ ret = tdm_fsl_enable(priv->adap);
+ if (!ret)
+ goto err_tdminit;
+ }
+
+ return 0;
+
+err_tdminit:
+fail_adapter:
+ free_irq(priv->dmac_done_intr, priv);
+err_dmacdoneisr:
+ free_irq(priv->tdm_err_intr, priv);
+err_dmacdone_irqmap:
+ irq_dispose_mapping(priv->dmac_done_intr);
+err_dmacreg:
+ iounmap(priv->dmac_regs);
+err_tdmregs:
+err_resource:
+ dev_set_drvdata(&pdev->dev, NULL);
+ kfree(priv);
+err_alloc:
+ return ret;
+}
+
+static int __devexit tdm_fsl_remove(struct platform_device *pdev)
+{
+ struct tdm_priv *priv;
+ int buf_size;
+ struct tdm_adapter *adap;
+
+ if (!pdev) {
+ pr_err("%s: Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+ priv = dev_get_drvdata(&pdev->dev);
+ adap = priv->adap;
+
+ tdm_fsl_disable(priv->adap);
+
+ tdm_fsl_stop(priv);
+
+ tdm_del_adapter(priv->adap);
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ /* free the irqs and dispose their mapping */
+ free_irq(priv->tdm_err_intr, priv);
+ free_irq(priv->dmac_done_intr, priv);
+ irq_dispose_mapping(priv->tdm_err_intr);
+ irq_dispose_mapping(priv->dmac_done_intr);
+ iounmap(priv->tdm_regs);
+ iounmap(priv->dmac_regs);
+
+ /* free the buffers */
+ buf_size =
+ TDM_3BUF_SIZE(adap->adapt_cfg.num_ch,
+ adap->adapt_cfg.slot_width,
+ adap->adapt_cfg.num_frames);
+ dma_free_coherent(priv->device, buf_size, priv->dma_input_vaddr,
+ priv->dma_input_paddr);
+ dma_free_coherent(priv->device, buf_size, priv->dma_output_vaddr,
+ priv->dma_output_paddr);
+
+ /* free the TCDs */
+ dma_free_coherent(priv->device, NUM_OF_TDM_BUF * TCD_SIZE,
+ priv->dma_rx_tcd_vaddr, priv->dma_rx_tcd_paddr);
+ dma_free_coherent(priv->device, NUM_OF_TDM_BUF * TCD_SIZE,
+ priv->dma_tx_tcd_vaddr, priv->dma_tx_tcd_paddr);
+ dev_set_drvdata(&pdev->dev, NULL);
+ kfree(priv);
+ return 0;
+}
+
+static const struct of_device_id fsl_tdm_match[] = {
+ {
+ .compatible = "fsl,tdm1.0",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, fsl_tdm_match);
+
+static struct platform_driver tdm_fsl_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ .of_match_table = fsl_tdm_match,
+
+ },
+ .probe = tdm_fsl_probe,
+ .remove = __devexit_p(tdm_fsl_remove),
+};
+
+static int __init tdm_fsl_init(void)
+{
+ int ret;
+ pr_info(DRV_NAME ": " DRV_DESC ":Init\n");
+ ret = platform_driver_register(&tdm_fsl_driver);
+ if (ret)
+ pr_err(DRV_NAME "of_register_platform_driver failed (%i)\n",
+ ret);
+ return ret;
+}
+
+static void __exit tdm_fsl_exit(void)
+{
+ pr_info(DRV_NAME ": " DRV_DESC ":Exit\n");
+ platform_driver_unregister(&tdm_fsl_driver);
+}
+
+module_init(tdm_fsl_init);
+module_exit(tdm_fsl_exit);
+/*
+ module_platform_driver(tdm_fsl_driver);
+ */
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("P.V.Suresh, Freescale Semiconductor");
+MODULE_DESCRIPTION("Driver For Freescale TDM controller");
--
1.5.6.5
--
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